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dates

Dates

Compare dates, show relative time, and measure durations. Helpful helpers when Intl alone is not quite enough.

timeFrom

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Show how long ago or how far away a date is, like "Now", "1 minute ago", or "in 4 months". Use style "long" for "10 days ago", "short" for "10d ago". Other locales use Intl.RelativeTimeFormat.

Date

Now (optional)

Locale

Default: 'en-US'

Style

Default: long · short → 10d

Threshold

Seconds · default 30

timeFrom("2025-06-15T12:00")

1 year ago

Result

timeDifference

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Measure the gap between two dates. With unit set to "auto", you get a breakdown like "2 days 5 hrs". Pick a single unit like "days" to get something like "6212 days".

From

Unit

Locale

Default: 'en-US'

Style

Auto mode

Max parts

Auto mode

timeDifference("2025-01-01T00:00", "2025-01-11T00:00")

10 days

Result

combineDates

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From

Locale

Default: 'en-US'

Display

Default: 'long'

Show Time

Multi-day ranges

combineDates("2025-01-01T10:00:00", "2025-01-31T14:30:00")

1-31 January 2025

Result

isToday

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Date

isToday("2025-06-15T12:00")

false

Result

isPast

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Check if a date is in the past.

Date

isPast("2020-01-01T12:00")

true

Result

isFuture

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Check if a date is in the future

Date

isFuture("2030-01-01T12:00")

true

Result

isSameDay

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Check if two dates fall on the same calendar day in local time.

Date A

Date B

isSameDay("2025-06-15T08:00", "2025-06-15T20:00")

true

Result

isSameMonth

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Check if two dates fall in the same calendar month in local time.

Date A

Date B

isSameMonth("2025-06-01T08:00", "2025-06-28T20:00")

true

Result

isDateBetween

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Check if a date falls between a start and end date by timestamp.

Date

Start

End

isDateBetween("2025-06-15T12:00", "2025-06-01T00:00", "2025-06-30T00:00")

true

Result