MCP Time Server

BrainyCalc Docs — MCP Date & Time Tools

MCP Date & Time Tools

High-precision temporal calculation engine supporting ISO 8601 parsing, timezone conversions, business days, duration math, relative time formatting, and full calendar generation.

All 50 date & time calculation tools are available as a standalone Model Context Protocol (MCP) server. Install via npx -y @brainycalc/mcptimeserver to empower AI assistants (LM Studio, Claude Desktop) with deterministic temporal operations.

1. Core & Formatting

now

Get current date and time, optionally formatted or adjusted for a target timezone.

coremcp tool

Parameter	Type	Required	Description
format	string	optional	Output format token string (e.g. YYYY-MM-DD HH:mm:ss)
timezone	string	optional	Target IANA timezone (e.g. America/New_York)

{ "format": "YYYY-MM-DD HH:mm:ss", "timezone": "America/New_York" }

"2026-08-11 14:02:00"

LLMs Samples Queries

• What is the current date and time?
• What is the time right now in New York formatted as YYYY-MM-DD HH:mm:ss?
• Give me today's date and current time.

format_date

Format an incoming date into a custom localized token string.

formattingmcp tool

Parameter	Type	Required	Description
date	string	required	Date string or now
format	string	required	Format pattern (e.g. dddd, MMMM D, YYYY)
inputFormat	string	optional	Parse format for non-standard date inputs
timezone	string	optional	Target IANA timezone

{ "date": "2026-08-11T14:02:00Z", "format": "dddd, MMMM D, YYYY" }

"Tuesday, August 11, 2026"

LLMs Samples Queries

• Show only the month from 2026-08-11.
• Can you reformat '2026/08/11' into 'DD/MM/YYYY'?
• Display this timestamp in full written words: 2026-08-11.

parse_date

Deconstruct a date string into structured components (year, month, ISO week, quarter, Unix, etc.).

parsermcp tool

Parameter	Type	Required	Description
date	string	required	Date string to parse
inputFormat	string	optional	Parse format for non-standard input strings

{ "date": "2026-08-11" }

{
  "year": 2026,
  "month": 8,
  "day": 11,
  "dayOfWeek": 2,
  "dayOfWeekName": "Tuesday",
  "weekOfYear": 33,
  "quarter": 3,
  "unix": 1786406400,
  "iso": "2026-08-11T00:00:00.000Z"
}

LLMs Samples Queries

• Break down '2026-08-11' into its calendar components.
• What day of the week and week number was August 11, 2026?
• Extract the quarter, year, and ISO week from '2026-08-11'.

adjust_time

Add or subtract specified time units from a base date.

mathmcp tool

Parameter	Type	Required	Description
date	string	optional	Base date or now
amount	number	required	Quantity to shift
unit	string	required	Unit (millisecond, second, minute, hour, day, week, month, quarter, year)
operation	enum	optional	add or subtract (default: add)
format	string	optional	Output format pattern

{ "date": "2026-08-11", "amount": 3, "unit": "months" }

"2026-11-11T00:00:00.000Z"

LLMs Samples Queries

• What date will it be 3 months from August 11, 2026?
• Subtract 45 minutes from 10:00 AM today.
• Add 3 weeks to 2026-08-11.

boundary_of

Get start or end boundary of a unit (year, quarter, month, week, isoWeek, day, hour) for a date.

boundarymcp tool

Parameter	Type	Required	Description
date	string	optional	Date or now
unit	enum	required	year | quarter | month | week | isoWeek | day | hour | minute | second
edge	enum	optional	start or end (default: start)
format	string	optional	Output format string

{ "date": "2026-08-11", "unit": "month", "edge": "end" }

"2026-08-31T23:59:59.999Z"

LLMs Samples Queries

• What is the end of August 2026?
• When does the current week end?.
• When does Q3 2026 end?

get_date_format

Resolve English date component terms ('month name', 'unix milliseconds') into format tokens or compose format strings.

utilitymcp tool

Parameter	Type	Required	Description
part	string | array	required	Plain English part name(s) or __list__
verbose	boolean	optional	Return full descriptors (token, description, example)
compose	boolean	optional	Join array of parts into a ready format string
separator	string	optional	Separator when compose is true (default: '')

{ "part": ["full year", "month", "day"], "compose": true, "separator": "-" }

"YYYY-MM-DD"

LLMs Samples Queries

• What format tokens should I use for 'year-month-day'?
• Compose a format string with full year, month name, and day.
• What is the formatting token for full month name?

format_standard

Format date according to standardized specifications: ISO 8601, ISO 9075, RFC 3339, or RFC 7231 (HTTP).

standardmcp tool

Parameter	Type	Required	Description
date	string	optional	Date or now
standard	enum	optional	iso | iso9075 | rfc3339 | rfc7231 (default: iso)
representation	enum	optional	For ISO mode: complete | date | time

{ "date": "2026-08-11T14:30:00Z", "standard": "rfc7231" }

"Tue, 11 Aug 2026 14:30:00 GMT"

LLMs Samples Queries

• Format August 11, 2026 into HTTP RFC 7231 header date format.
• Convert this date into standard ISO 8601 string format.
• Generate an RFC 3339 timestamp for right now.

parse_strict

Strictly parse inputs from ISO strings, JSON date strings, Unix seconds, or Unix milliseconds.

parsermcp tool

Parameter	Type	Required	Description
input	string | number	required	Value to parse
inputType	enum	optional	iso | json | unix_s | unix_ms (default: iso)
format	string	optional	Optional format pattern for output string

{ "input": 1786406400, "inputType": "unix_s" }

{
  "input": 1786406400,
  "inputType": "unix_s",
  "iso": "2026-08-11T00:00:00.000Z",
  "unix": 1786406400,
  "unixMs": 1786406400000
}

LLMs Samples Queries

• Parse this Unix timestamp 1786406400 in seconds into an ISO date.
• Strictly parse "2026-08-11" and convert it to an ISO timestamp.
• Convert Unix epoch milliseconds 1786406400000 into a human readable date.

to_representation

Convert a date object into alternate representations: array, object, JSON, UTC string, or ISO string.

conversionmcp tool

Parameter	Type	Required	Description
date	string	optional	Date string or now
output	enum	required	array | object | json | utcString | isoString

{ "date": "2026-08-11", "output": "array" }

[2026, 7, 11, 0, 0, 0, 0]

LLMs Samples Queries

• Convert '2026-08-11' into an array of date numbers.
• Export this date as a raw JavaScript date object representation.
• Give me '2026-08-11' as a UTC string.

utc_date

Parse or convert a date in UTC mode, preserving or converting local wall clock values.

utcmcp tool

Parameter	Type	Required	Description
date	string	optional	Date string or now
format	string	optional	Output format pattern
keepLocalTime	boolean	optional	Retain local time numbers when converting to UTC

{ "date": "2026-08-11T12:00:00", "keepLocalTime": true }

"2026-08-11T12:00:00.000Z"

LLMs Samples Queries

• Convert local time 12:00 to UTC while keeping the local time numbers.
• Get the UTC date representation for August 11, 2026.
• Parse '2026-08-11T12:00:00' directly in UTC.

2. Difference & Comparison

date_diff

Calculate exact differences between two dates (returns scalar value or detailed breakdown).

mathmcp tool

Parameter	Type	Required	Description
date1	string	required	First date (ISO format or now)
date2	string	required	Second date to compare against
unit	string	optional	Unit for scalar diff (omit for full breakdown)
float	boolean	optional	Return floating-point scalar diff

{ "date1": "2026-08-11", "date2": "2026-12-25" }

{
  "date1": "2026-08-11",
  "date2": "2026-12-25",
  "days": 136,
  "weeks": 19.43,
  "months": 4.47,
  "years": 0.3723,
  "formatted": "19 weeks and 3 days"
}

LLMs Samples Queries

• How many days are between August 11, 2026 and December 25, 2026?
• Calculate the difference in weeks and days between these two dates.

calc_age

Calculate exact age in years, months, days, total weeks, and total days relative to target date.

humanmcp tool

Parameter	Type	Required	Description
birthDate	string	required	Birth date string (YYYY-MM-DD). Alias: birth_date
targetDate	string	optional	Comparison reference date (defaults to today). Alias: reference_date

{ "birthDate": "1995-05-15", "targetDate": "2026-08-11" }

{
  "birthDate": "1995-05-15",
  "years": 31,
  "months": 2,
  "days": 27,
  "totalDays": 11411,
  "totalWeeks": 1630,
  "formatted": "31 years, 2 months, 27 days"
}

LLMs Samples Queries

• How old is someone born on May 15, 1995 as of August 11, 2026?
• Calculate exact age in years, months, and days for May 15, 1995.
• How many total weeks old is a person born on 1995-05-15?

compare_dates

Evaluate boolean date comparison predicates: isBefore, isAfter, isSame, isSameOrBefore, isSameOrAfter.

comparisonmcp tool

Parameter	Type	Required	Description
date1	string	optional	First date or now
date2	string	required	Second date to compare against
comparison	enum	required	isBefore | isAfter | isSame | isSameOrBefore | isSameOrAfter
unit	string	optional	Comparison unit granularity (e.g. month, day)

{ "date1": "2026-08-11", "date2": "2026-08-15", "comparison": "isBefore" }

true

LLMs Samples Queries

• Is August 11, 2026 before August 15, 2026?
• Check if date A is equal to date B ignoring time.
• Is 2026-08-11 after 2026-08-01?

is_between

Check if a date falls between start and end boundaries with configurable inclusivity options.

comparisonmcp tool

Parameter	Type	Required	Description
date	string	optional	Target date or now
start	string	required	Range start date
end	string	required	Range end date
unit	string	optional	Comparison unit granularity
inclusivity	enum	optional	() | (] | [) | [] (default: ())

{ "date": "2026-08-11", "start": "2026-08-01", "end": "2026-08-31", "inclusivity": "[]" }

true

LLMs Samples Queries

• Is today between 2025-01-01 and 2025-12-31?
• Does August 11, 2026 fall within the range August 1 to August 31, 2026?
• Check if '2026-08-11' is strictly between two boundary dates.

date_compare

Run complete date comparison matrix across all unit granularities simultaneously.

comparisonmcp tool

Parameter	Type	Required	Description
date1	string	required	First date string or now
date2	string	required	Second date string or now

{ "date1": "2026-08-11", "date2": "2026-08-15" }

{
  "compareAsc": -1,
  "compareDesc": 1,
  "isSameDay": false,
  "isSameWeek": true,
  "isSameMonth": true,
  "isSameQuarter": true,
  "isSameYear": true
}

LLMs Samples Queries

• Compare two dates across all units like same week, same month, same year.
• Are August 11, 2026 and August 15, 2026 in the same month and week?
• Get full comparative breakdown between 2026-08-11 and 2026-08-15.

relative_time

Get a human-readable relative time expression (e.g. '3 days ago', 'in 2 months').

relativemcp tool

Parameter	Type	Required	Description
date	string	optional	Date or now
relativeTo	string	optional	Reference date instead of current time
withoutSuffix	boolean	optional	Omit 'ago' / 'in' suffix
direction	enum	optional	from or to (default: from)

{ "date": "2026-08-01", "relativeTo": "2026-08-11" }

"10 days ago"

LLMs Samples Queries

• How long ago was August 1, 2026 compared to August 11, 2026?
• Format August 1, 2026 as relative time (e.g. '10 days ago').
• Express the date difference human-readably without suffixes.

intl_format_distance

Locale-aware relative time formatting utilizing standard Intl.RelativeTimeFormat.

i18nmcp tool

Parameter	Type	Required	Description
date	string	optional	Target date (default: now)
baseDate	string	optional	Reference comparison date (default: now)
locale	string	optional	BCP 47 locale tag (e.g. en, fr, es)
numeric	enum	optional	auto or always
style	enum	optional	long | short | narrow
unit	string	optional	Explicit unit (second, minute, hour, day, week, month, year)

{ "date": "2026-08-14", "baseDate": "2026-08-11", "locale": "es" }

{
  "formatted": "dentro de 3 días",
  "unit": "day",
  "value": 3,
  "locale": "es"
}

LLMs Samples Queries

• Show relative time distance in Spanish ('dentro de 3 días') for August 14.
• Get localized relative time distance between August 11 and August 14, 2026.

closest_date

Find which date in an array of candidates is nearest to a reference date.

searchmcp tool

Parameter	Type	Required	Description
date	string	optional	Reference date (defaults to now)
dates	array	required	Array of candidate date strings
format	string	optional	Output formatting string

{
  "date": "2026-08-11",
  "dates": ["2026-01-01", "2026-08-10", "2026-12-31"]
}

{
  "closestIndex": 1,
  "closestDate": "2026-08-10T00:00:00.000Z",
  "diffMs": 86400000
}

LLMs Samples Queries

• Which date in this list [2026-01-01, 2026-08-10, 2026-12-31] is closest to August 11, 2026?

interval_overlap

Determine if two date intervals overlap and calculate overlapping days count.

intervalmcp tool

Parameter	Type	Required	Description
start1	string	required	Start of interval 1
end1	string	required	End of interval 1
start2	string	required	Start of interval 2
end2	string	required	End of interval 2
inclusive	boolean	optional	Include boundary touching as overlap
mode	enum	optional	overlapping or days

{
  "start1": "2026-08-01", "end1": "2026-08-15",
  "start2": "2026-08-10", "end2": "2026-08-20",
  "mode": "days"
}

{
  "overlaps": true,
  "overlapDays": 5,
  "overlapStart": "2026-08-10T00:00:00.000Z",
  "overlapEnd": "2026-08-15T00:00:00.000Z"
}

LLMs Samples Queries

• Do the date ranges Aug 1-15 and Aug 10-20 overlap?
• Calculate how many days overlap between two event schedules.
• Check if interval 2026-08-01 to 2026-08-15 intersects with 2026-08-10 to 2026-08-20.

3. Business & Calendar

business_days

Count work days (Mon–Fri) between dates or add/subtract business days from a starting date.

businessmcp tool

Parameter	Type	Required	Description
mode	enum	optional	diff | add | subtract (default: diff)
startDate	string	optional	Start date string
endDate	string	optional	End date (for diff mode)
amount	number	optional	Business days count (for add / subtract)
format	string	optional	Output formatting pattern

{ "mode": "add", "startDate": "2026-08-07", "amount": 5 }

{
  "original": "2026-08-07",
  "amount": 5,
  "result": "2026-08-14"
}

LLMs Samples Queries

• Add 5 business days to Friday, August 7, 2026.
• How many work days are there between August 1 and August 15, 2026?
• Subtract 10 business days from August 11, 2026.

work_days

Calculate working days between two dates with optional weekend inclusion flags.

workmcp tool

Parameter	Type	Required	Description
startDate	string	required	Start date (YYYY-MM-DD)
endDate	string	required	End date (YYYY-MM-DD)
includeWeekends	boolean	optional	Include Saturday and Sunday (default: false)

{ "startDate": "2026-08-01", "endDate": "2026-08-11" }

{
  "startDate": "2026-08-01",
  "endDate": "2026-08-11",
  "workDaysCount": 7,
  "weekendsIncluded": false
}

LLMs Samples Queries

• Count the total working days between 2026-08-01 and 2026-08-11.
• How many days excluding weekends are in the first half of August 2026?

calendar_month

Generate a complete month calendar matrix structured into week arrays for calendar UI displays.

calendarmcp tool

Parameter	Type	Required	Description
date	string	optional	Reference date in target month
weekStart	enum	optional	0 (Sunday) or 1 (Monday)
format	string	optional	Date string output format pattern

{ "date": "2026-08-01", "weekStart": 1 }

{
  "month": "August 2026",
  "year": 2026,
  "daysInMonth": 31,
  "weeks": [ /* Arrays containing week objects */ ]
}

LLMs Samples Queries

• Generate a full month calendar matrix for August 2026 starting on Monday.
• Get all weeks and dates in August 2026 structured for UI calendar layout.
• Build a monthly calendar view grid for August 2026.

each_weekend_of

Get array of all weekend dates (Saturday and Sunday) within a specified interval, month, or year.

calendarmcp tool

Parameter	Type	Required	Description
mode	enum	optional	interval | month | year (default: interval)
date	string	optional	Reference date for month or year mode
start	string	optional	Start date for interval mode
end	string	optional	End date for interval mode

{ "mode": "month", "date": "2026-08-01" }

{
  "mode": "month",
  "count": 10,
  "weekends": ["2026-08-01", "2026-08-02", "2026-08-08", "..."]
}

LLMs Samples Queries

• List all weekend dates (Saturdays and Sundays) in August 2026.
• Get every weekend day date in the year 2026.
• Find all weekend dates between August 1 and August 31, 2026.

day_of_week

Get day name, month name, year, weekend flag, day of year, and week number for any date.

metadatamcp tool

Parameter	Type	Required	Description
date	string	required	Date string (YYYY-MM-DD)

{ "date": "2026-08-11" }

{
  "date": "2026-08-11",
  "dayName": "Tuesday",
  "month": "August",
  "dayNumber": 11,
  "year": 2026,
  "isWeekend": false,
  "dayOfYear": 223,
  "weekNumber": 2
}

LLMs Samples Queries

• What day of the week is August 11, 2026?
• Is August 11, 2026 a weekend or weekday?
• What is the day of year number for August 11, 2026?

last_day_of

Return the last day of a period (month, year, quarter, week, isoWeek, decade).

boundarymcp tool

Parameter	Type	Required	Description
date	string	optional	Reference date or now
unit	enum	required	month | year | quarter | week | isoWeek | isoWyear | decade
format	string	optional	Output format pattern

{ "date": "2026-08-11", "unit": "quarter" }

{
  "input": "2026-08-11",
  "unit": "quarter",
  "lastDay": "2026-09-30"
}

LLMs Samples Queries

• What is the last day of Q3 2026?
• Find the last day of the month for August 2026.
• What is the last day of the decade for 2026-08-11?

countdown

Generate structured remaining time or elapsed time breakdowns relative to a target timestamp.

timermcp tool

Parameter	Type	Required	Description
date	string	required	Target date or timestamp
format	string	optional	Formatting string for target date output

{ "date": "2027-01-01T00:00:00Z" }

{
  "target": "2027-01-01T00:00:00.000Z",
  "isFuture": true,
  "breakdown": {
    "days": 142,
    "hours": 9,
    "minutes": 58,
    "seconds": 0
  },
  "formatted": "142d 9h 58m 0s"
}

LLMs Samples Queries

• How many days, hours, and minutes remain until New Year 2027?
• Generate a live countdown breakdown to 2027-01-01T00:00:00Z.
• How much time is left until midnight on January 1, 2027?

4. Timezones & World Clock

convert_timezone

Project timestamps across world IANA timezones while handling DST transitions seamlessly.

timezonesmcp tool

Parameter	Type	Required	Description
date	string	optional	Date string or now
fromTimezone	string	optional	Origin IANA timezone (e.g. UTC)
toTimezone	string	required	Destination IANA timezone (e.g. Asia/Tokyo)
format	string	optional	Output formatting pattern

{
  "date": "2026-08-11T12:00:00",
  "fromTimezone": "UTC",
  "toTimezone": "Asia/Tokyo"
}

"2026-08-11T21:00:00+09:00"

LLMs Samples Queries

• What time is 12:00 PM UTC in Tokyo (Asia/Tokyo)?
• Convert 2026-08-11 14:00 from America/New_York to Europe/London.
• Project a UTC timestamp into Tokyo local time.

local_time

Get current local time, date, timezone name, and offset for the runtime execution environment.

systemmcp tool

Takes no required parameters. Inspects local system environment clock and locale settings.

{}

{
  "local_time": "15:28:00",
  "local_date": "Tuesday, August 11, 2026",
  "timezone": "America/New_York",
  "timezone_offset_mins": 240
}

LLMs Samples Queries

• What is my system's local time, date, and timezone offset?
• Show current local time and timezone for this server.
• Get the local system clock and UTC offset in minutes.

world_time

Query active local time, country flags, and offsets across major cities or global world regions.

worldmcp tool

Parameter	Type	Required	Description
query	string	optional	City or country name (e.g. Tokyo, Germany)
region	enum	optional	Filter region (All | Africa | Americas | Asia | Europe | Oceania)
timezone	string	optional	Direct IANA timezone string
offset_hours	number	optional	UTC offset hours fallback

{ "query": "Tokyo" }

{
  "query": "Tokyo",
  "match_count": 1,
  "results": [
    {
      "flag": "🇯🇵",
      "country": "Japan",
      "city": "Tokyo",
      "timezone": "Asia/Tokyo",
      "time": "23:02:00",
      "offset_string": "GMT+9"
    }
  ]
}

LLMs Samples Queries

• What time is it in Japan right now?
• Show the current time and GMT offset for Tokyo.
• Search local time for major cities in Europe.

time_duration

Calculate duration between two wall clock time strings (HH:MM or HH:MM:SS), handling overnight shifts automatically.

timemcp tool

Parameter	Type	Required	Description
start	string	required	Start time (e.g. 22:00)
end	string	required	End time (e.g. 06:30)

{ "start": "22:00", "end": "06:30" }

{
  "start": "22:00",
  "end": "06:30",
  "hours": 8,
  "minutes": 30,
  "total_seconds": 30600,
  "display": "8h 30m 0s"
}

LLMs Samples Queries

• How many hours and minutes passed between 10:00 PM and 6:30 AM next morning?
• Calculate duration between start time 09:00 and end time 17:30.
• What is the time difference in hours between 22:00 and 06:30?

5. Intervals & Durations

each_of_interval

Generate an array of step dates/times across an interval boundary.

generatormcp tool

Parameter	Type	Required	Description
start	string	required	Interval start ISO string
end	string	required	Interval end ISO string
unit	enum	optional	day | hour | minute | month | quarter | week | year (default: day)
step	number	optional	Step increment size (default: 1)
format	string	optional	Output formatting pattern

{ "start": "2026-08-01", "end": "2026-08-03", "unit": "day" }

{
  "count": 3,
  "dates": [
    "2026-08-01T00:00:00.000Z",
    "2026-08-02T00:00:00.000Z",
    "2026-08-03T00:00:00.000Z"
  ]
}

LLMs Samples Queries

• List every daily step date between August 1, 2026 and August 3, 2026.
• Generate hourly intervals between 2026-08-01T00:00 and 2026-08-01T12:00.
• Create an array of weekly dates across August 2026.

duration

Create and inspect durations from ISO strings, millisecond numbers, or unit object descriptors.

durationmcp tool

Parameter	Type	Required	Description
input	string | number | object	required	ISO 8601 string (P1Y2M), ms number, or unit object
unit	string	optional	Unit when input is a scalar number
outputFormat	enum	optional	iso | humanize | milliseconds | object

{ "input": "P1Y2M3D", "outputFormat": "object" }

{
  "years": 1,
  "months": 2,
  "days": 3,
  "hours": 0,
  "minutes": 0,
  "totalMilliseconds": 36979200000
}

LLMs Samples Queries

• Parse ISO duration 'P1Y2M3D' into structured years, months, and days.
• Convert 36979200000 milliseconds into human readable duration.
• Create a duration object from 2 hours and 30 minutes.

interval_to_duration

Convert start and end dates into a structured duration object broken down into years, months, days, etc.

durationmcp tool

Parameter	Type	Required	Description
start	string	required	Interval start ISO string
end	string	required	Interval end ISO string

{ "start": "2025-01-01", "end": "2026-08-11" }

{
  "years": 1,
  "months": 7,
  "days": 10,
  "humanized": "a year"
}

LLMs Samples Queries

• Convert interval from 2025-01-01 to 2026-08-11 into years, months, and days.
• How many years and months are between two specific dates?
• Get structured breakdown duration between start date and end date.

format_duration_string

Build a formatted English text string from duration component numbers.

durationmcp tool

Parameter	Type	Required	Description
years, months, weeks, days, hours, minutes, seconds	number	optional	Individual numeric duration parts
format	array	optional	Limit units shown (e.g. ["hours", "minutes"])
delimiter	string	optional	Unit separator (default: , )
zero	boolean	optional	Include zero value units (default: false)

{ "hours": 2, "minutes": 30 }

{
  "formatted": "2 hours, 30 minutes",
  "humanized": "in 3 hours",
  "iso": "PT2H30M"
}

LLMs Samples Queries

• Format 90 minutes as hour, minutes..
• Convert duration parts (2 hours, 30 mins) into an ISO string or English phrase.

parse_iso_duration

Parse an ISO 8601 duration string (e.g. 'P1Y2M3DT4H') into an object with all components.

durationmcp tool

Parameter	Type	Required	Description
iso	string	required	ISO 8601 duration string (e.g. P1Y6M, PT2H30M)

{ "iso": "PT2H30M" }

{
  "hours": 2,
  "minutes": 30,
  "seconds": 0,
  "totalMilliseconds": 9000000,
  "humanized": "in 3 hours"
}

LLMs Samples Queries

• Parse the ISO 8601 duration string 'PT2H30M'.
• Extract hours, minutes, and total milliseconds from 'P1Y6M'.
• Decode ISO duration 'PT1H45M' into standard component object.

clamp_date

Clamp a date within start and end interval boundaries.

mathmcp tool

Parameter	Type	Required	Description
date	string	optional	Date to clamp (defaults to now)
start	string	required	Lower bound date
end	string	required	Upper bound date
format	string	optional	Output formatting pattern

{ "date": "2026-12-31", "start": "2026-01-01", "end": "2026-08-31" }

{
  "clamped": "2026-08-31T00:00:00.000Z",
  "wasClamped": true
}

LLMs Samples Queries

• Clamp '2026-12-31' within bounds '2026-01-01' and '2026-08-31'.
• Ensure date does not exceed maximum allowable deadline August 31, 2026.
• Check if date was clamped when constrained between range boundaries.

round_to_nearest

Round date/time to nearest N minutes or N hours using floor, ceil, or standard rounding.

mathmcp tool

Parameter	Type	Required	Description
date	string	optional	Target date or now
unit	enum	optional	minutes or hours (default: minutes)
nearestTo	number	optional	Step increment (e.g. 15 for quarter hour)
roundingMethod	enum	optional	round | floor | ceil

{ "date": "2026-08-11T14:23:00Z", "nearestTo": 15 }

{
  "result": "2026-08-11T14:30:00.000Z"
}

LLMs Samples Queries

• Round 14:23:00 to the nearest 15 minutes.
• Floor current time to nearest 30 minute interval.

6. Components & Setters

date_part

Extract a specific date part: week, isoWeek, isoWeekday, quarter, dayOfYear, or weekday.

componentmcp tool

Parameter	Type	Required	Description
date	string	optional	Date or now
part	enum	required	week | isoWeek | isoWeekday | quarter | dayOfYear | weekday

{ "date": "2026-08-11", "part": "dayOfYear" }

223

LLMs Samples Queries

• Get the day of year number for August 11, 2026.
• What quarter of the year is August 11 in?
• Extract the ISO week number for 2026-08-11.

date_components_all

Retrieve every numeric and calendar component at once (year, month, date, hour, ISO week, quarter, Unix, decade, etc.).

componentmcp tool

Parameter	Type	Required	Description
date	string	optional	Date string or now

{ "date": "2026-08-11" }

{
  "year": 2026,
  "month": 8,
  "date_": 11,
  "dayOfWeek": 2,
  "isoDay": 2,
  "dayOfYear": 223,
  "daysInMonth": 31,
  "quarter": 3,
  "unix": 1786406400
}

LLMs Samples Queries

• Retrieve every component (year, month, date, quarter, day of year) for August 11, 2026.
• Get full numeric and text date breakdown for 2026-08-11.
• Show all temporal values for current date.

set_components

Set specific numeric date/time components on a base date and return the resulting timestamp.

settermcp tool

Parameter	Type	Required	Description
date	string	optional	Base date or now
year, month, day, hour, minute, second, millisecond	number	optional	Specific field values to modify
dayOfYear, quarter, week, isoWeek, isoDay, isoWeekYear, weekYear	number	optional	Calendar field modifications

{ "date": "2026-08-11", "month": 12, "day": 25 }

{
  "original": "2026-08-11T00:00:00.000Z",
  "result": "2026-12-25T00:00:00.000Z"
}

LLMs Samples Queries

• Set month to December and day to 25 on date '2026-08-11'.
• Modify year to 2028 for date '2026-08-11'.
• Set time to 15:30:00 on August 11, 2026.

days_in_month

Return total number of days in the month for a given date.

calendarmcp tool

Parameter	Type	Required	Description
date	string	optional	Date string or now

{ "date": "2024-02-15" }

29

LLMs Samples Queries

• How many days are in February 2024?
• What is the total day count in August 2026?
• Check how many days are in the month for '2026-02-15'.

convert_units

Convert a numeric value between time units (seconds, minutes, hours, days, weeks, months, years).

conversionmcp tool

Parameter	Type	Required	Description
value	number	required	Numeric quantity to convert
from	string	required	Source unit (e.g. hours, days)
to	string	required	Target unit (e.g. minutes, weeks)

{ "value": 36, "from": "hours", "to": "days" }

{
  "value": 36,
  "from": "hours",
  "to": "days",
  "result": 1.5
}

LLMs Samples Queries

• Convert 36 hours into days.
• How many minutes are in 2.5 hours?
• Convert 14 days into weeks.

time_add

Add or subtract hours, minutes, and/or seconds to a wall clock time string.

timemcp tool

Parameter	Type	Required	Description
time	string	required	Base wall clock time (e.g. 14:30:00)
add_hours	number	optional	Hours to add (negative to subtract)
add_minutes	number	optional	Minutes to add
add_seconds	number	optional	Seconds to add

{ "time": "14:30:00", "add_minutes": 45 }

{
  "original": "14:30:00",
  "result": "15:15:00"
}

LLMs Samples Queries

• Add 45 minutes to 14:30:00.
• Subtract 2 hours from wall time 01:15:00.
• Add 3 hours and 15 minutes to 09:00:00.

7. Validation & Predicates

is_valid

Check whether a date string represents a valid, parseable calendar date.

validationmcp tool

Parameter	Type	Required	Description
date	string	required	Date string to validate
inputFormat	string	optional	Expected parsing format pattern

{ "date": "2026-02-31" }

false

LLMs Samples Queries

• Is '2026-02-31' a valid calendar date?
• Check if string '2026-08-11' is a valid date.
• Validate if '2025-13-40' can be parsed as a real date.

date_predicate

Test specific boolean predicates on a date: isLeapYear, isToday, isTomorrow, isYesterday.

predicatemcp tool

Parameter	Type	Required	Description
date	string	optional	Target date string or now
predicate	enum	required	isLeapYear | isToday | isTomorrow | isYesterday

{ "date": "2024-08-11", "predicate": "isLeapYear" }

true

LLMs Samples Queries

• Is 2024 a leap year?
• Is August 11, 2026 today?
• Check if '2026-08-10' is yesterday.

date_predicates

Run all calendar and temporal boolean predicates simultaneously for a date.

predicatemcp tool

Parameter	Type	Required	Description
date	string	optional	Target date or now

{ "date": "2026-08-11" }

{
  "isTuesday": true,
  "isWeekend": false,
  "isWeekday": true,
  "isLeapYear": false,
  "isThisMonth": true,
  "isThisYear": true
}

LLMs Samples Queries

• Check all boolean flags (isTuesday, isWeekend, isLeapYear, isThisMonth) for August 11, 2026.
• Run all calendar predicates on '2026-08-11'.
• Is 2026-08-11 a weekday, weekend, or leap year?

unix_convert

Convert between date strings and Unix timestamps (seconds & milliseconds).

conversionmcp tool

Parameter	Type	Required	Description
date	string	optional	Date string (for to_unix mode)
fromUnix	number	optional	Unix timestamp in seconds (shorthand conversion)
mode	enum	optional	to_unix or from_unix (default: to_unix)

{ "fromUnix": 1786406400 }

"2026-08-11T00:00:00.000Z"

LLMs Samples Queries

• Convert Unix timestamp 1786406400 to an ISO date string.
• Get the Unix epoch seconds timestamp for '2026-08-11'.
• Convert 1786406400 seconds into standard UTC date.

min_max

Find the earliest (min) or latest (max) date from an array of date strings.

searchmcp tool

Parameter	Type	Required	Description
dates	array	required	Array of candidate date strings
operation	enum	required	min (earliest) or max (latest)
format	string	optional	Output formatting pattern

{
  "dates": ["2026-01-01", "2026-08-11", "2026-12-25"],
  "operation": "max"
}

"2026-12-25T00:00:00.000Z"

LLMs Samples Queries

• Find the latest date among ['2026-01-01', '2026-08-11', '2026-12-25'].
• Which date is earliest in this array of date strings?
• Get maximum (latest) date from my list of project milestones.

locale_data

Retrieve locale metadata arrays (months, short months, weekday names, first day of week).

i18nmcp tool

Parameter	Type	Required	Description
part	enum	required	months | monthsShort | weekdays | weekdaysShort | weekdaysMin | firstDayOfWeek
locale	string	optional	Target locale code (default: en)

{ "part": "months" }

[
  "January", "February", "March", "April", "May", "June",
  "July", "August", "September", "October", "November", "December"
]

LLMs Samples Queries

• Get array of full month names in English.
• Get short weekday names for English locale.
• What is the first day of week in English locale data?

next_prev_weekday

Find the next or previous occurrence of a specific weekday relative to a start date.

calendarmcp tool

Parameter	Type	Required	Description
date	string	optional	Start reference date (default: now)
weekday	string | number	required	Target day: 0–6 or weekday name (monday, friday)
direction	enum	optional	next or previous (default: next)
format	string	optional	Output formatting pattern

{ "date": "2026-08-11", "weekday": "friday", "direction": "next" }

{
  "from": "2026-08-11",
  "direction": "next",
  "weekdayRequested": "friday",
  "result": "2026-08-14"
}

LLMs Samples Queries

• When is the next Friday relative to August 11, 2026?
• Find the previous Monday before August 11, 2026.
• What date will be the next Sunday?