Date & Time

now: Get current date/time

string

Timezone (e.g., America/New_York). Defaults to UTC.

string

Output format. Defaults to ISO 8601.

Example request:

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

Example response:

{ "result": "2025-06-15 14:30:22" }

format: Format date to string

string

required

Date to format (ISO 8601, Unix timestamp, or parseable string).

string

required

Output format string (e.g., YYYY-MM-DD HH:mm:ss, DD/MM/YYYY).

string

Convert to timezone before formatting.

Example request:

{
  "date": "2025-03-15T10:30:00Z",
  "format": "dddd, MMMM D, YYYY [at] hh:mm A",
  "timezone": "America/Los_Angeles"
}

Example response:

{ "result": "Saturday, March 15, 2025 at 03:30 AM" }

parse: Parse date string

Parse a date string to ISO 8601 format.

string

required

Date string to parse.

string

Expected input format (e.g., MM/DD/YYYY).

string

Timezone to interpret the date in. Defaults to UTC.

Example request:

{
  "date": "15/03/2025 14:30",
  "inputFormat": "DD/MM/YYYY HH:mm",
  "timezone": "Europe/London"
}

Example response:

{ "iso": "2025-03-15T14:30:00.000Z" }

add: Add duration to date

string

required

Starting date.

number

required

Amount to add (can be negative).

string

required

Unit: year, month, week, day, hour, minute, second, or millisecond.

Example request:

{ "date": "2025-01-15T00:00:00Z", "value": 30, "unit": "day" }

Example response:

{ "iso": "2025-02-14T00:00:00.000Z" }

subtract: Subtract duration from date

string

required

Starting date.

number

required

Amount to subtract.

string

required

Unit: year, month, week, day, hour, minute, second, or millisecond.

Example request:

{ "date": "2025-06-01T12:00:00Z", "value": 3, "unit": "month" }

Example response:

{ "iso": "2025-03-01T12:00:00.000Z" }

diff: Difference between dates

string

required

First date.

string

required

Second date.

string

default:"day"

Unit for the result.

boolean

default:"false"

Return decimal value.

Example request:

{
  "date1": "2025-12-25T00:00:00Z",
  "date2": "2025-01-01T00:00:00Z",
  "unit": "day"
}

Example response:

{ "value": 358, "unit": "day" }

timezone: Convert between timezones

string

required

Date to convert.

string

Source timezone.

string

required

Target timezone.

string

Output format.

Example request:

{
  "date": "2025-06-15 09:00",
  "from": "America/New_York",
  "to": "Asia/Tokyo",
  "format": "YYYY-MM-DD HH:mm:ss Z"
}

Example response:

{ "result": "2025-06-15 22:00:00 +09:00" }

start-of: Start of time period

Get the start of a year, month, week, day, hour, minute, or second.

string

required

Reference date.

string

required

Unit: year, month, week, day, hour, minute, or second.

Example request:

{ "date": "2025-06-15T14:30:00Z", "unit": "month" }

Example response:

{ "iso": "2025-06-01T00:00:00.000Z" }

end-of: End of time period

Get the end of a year, month, week, day, hour, minute, or second.

string

required

Reference date.

string

required

Unit: year, month, week, day, hour, minute, or second.

Example request:

{ "date": "2025-06-15T14:30:00Z", "unit": "month" }

Example response:

{ "iso": "2025-06-30T23:59:59.999Z" }

is-before: Check if before another date

string

required

Date to check.

string

required

Date to compare against.

string

Comparison granularity.

Example request:

{
  "date": "2025-01-15T00:00:00Z",
  "compareTo": "2025-06-01T00:00:00Z",
  "unit": "month"
}

Example response:

{ "result": true }

is-after: Check if after another date

string

required

Date to check.

string

required

Date to compare against.

string

Comparison granularity.

Example request:

{
  "date": "2025-12-01T00:00:00Z",
  "compareTo": "2025-06-01T00:00:00Z"
}

Example response:

{ "result": true }

is-between: Check if between two dates

string

required

Date to check.

string

required

Start of range.

string

required

End of range.

string

Comparison granularity.

string

default:"()"

Boundary inclusivity: (), [], [), or (].

Example request:

{
  "date": "2025-06-15T00:00:00Z",
  "start": "2025-06-01T00:00:00Z",
  "end": "2025-06-30T23:59:59Z",
  "inclusivity": "[]"
}

Example response:

{ "result": true }

relative: Human-readable relative time

Returns strings like “2 hours ago” or “in 3 days”.

string

required

Date to format.

string

Reference date (defaults to now).

boolean

default:"false"

Omit “ago” or “in” prefix/suffix.

Example request:

{
  "date": "2025-06-10T00:00:00Z",
  "from": "2025-06-15T00:00:00Z"
}

Example response:

{ "text": "5 days ago" }

parts: Extract date components

Extract year, month, day, hour, minute, second, etc.

string

required

Date to extract from.

string

Timezone for extraction.

Example request:

{ "date": "2025-06-15T14:30:00Z", "timezone": "America/New_York" }

Example response:

{
  "year": 2025,
  "month": 6,
  "day": 15,
  "hour": 10,
  "minute": 30,
  "second": 0,
  "millisecond": 0,
  "dayOfWeek": 0,
  "dayOfYear": 166,
  "weekOfYear": 25,
  "quarter": 2,
  "isLeapYear": false,
  "daysInMonth": 30,
  "unix": 1750000200,
  "iso": "2025-06-15T14:30:00.000Z"
}

unix: Convert to/from Unix timestamp

string | number

required

Date string or Unix timestamp.

boolean

default:"true"

true = date to timestamp, false = timestamp to date.

boolean

default:"false"

Use milliseconds instead of seconds.

Example request:

{ "value": "2025-06-15T00:00:00Z", "toUnix": true }

Example response:

{ "unix": 1749945600 }

list-timezones: List timezone identifiers

Returns a list of common timezone identifiers. No parameters required.Example request:

{}

Example response:

{
  "timezones": [
    "UTC",
    "America/New_York",
    "America/Chicago",
    "America/Denver",
    "America/Los_Angeles",
    "Europe/London",
    "Europe/Paris",
    "Asia/Tokyo",
    "Australia/Sydney",
    "Pacific/Auckland"
  ],
  "count": 26
}

Overview

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