experimental.addDuration() function

experimental.addDuration() is subject to change at any time.

experimental.addDuration() adds a duration to a time value and returns the resulting time value.


experimental.addDuration() is deprecated in favor of date.add().

Function type signature
(d: duration, to: A, ?location: {zone: string, offset: duration}) => time where A: Timeable
For more information, see Function type signatures.



(Required) Duration to add.


(Required) Time to add the duration to.


Location to use for the time value.

Use an absolute time or a relative duration. Durations are relative to now().


Add six hours to a timestamp

import "experimental"

experimental.addDuration(d: 6h, to: 2019-09-16T12:00:00Z)// Returns 2019-09-16T18:00:00.000000000Z

Add one month to yesterday

A time may be represented as either an explicit timestamp or as a relative time from the current now time. addDuration can support either type of value.

import "experimental"

option now = () => 2021-12-10T16:27:40Z

experimental.addDuration(d: 1mo, to: -1d)// Returns 2022-01-09T16:27:40Z

Add six hours to a relative duration

import "experimental"

option now = () => 2022-01-01T12:00:00Z

experimental.addDuration(d: 6h, to: 3h)// Returns 2022-01-01T21:00:00.000000000Z

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