113 lines
2.3 KiB
Markdown
113 lines
2.3 KiB
Markdown
---
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title: date.add() function
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description: >
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`date.add()` adds a duration to a time value and returns the resulting time value.
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menu:
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flux_v0_ref:
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name: date.add
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parent: date
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identifier: date/add
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weight: 101
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flux/v0/tags: [date/time]
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introduced: 0.162.0
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---
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<!------------------------------------------------------------------------------
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IMPORTANT: This page was generated from comments in the Flux source code. Any
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edits made directly to this page will be overwritten the next time the
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documentation is generated.
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To make updates to this documentation, update the function comments above the
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function definition in the Flux source code:
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https://github.com/influxdata/flux/blob/master/stdlib/date/date.flux#L744-L744
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Contributing to Flux: https://github.com/influxdata/flux#contributing
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Fluxdoc syntax: https://github.com/influxdata/flux/blob/master/docs/fluxdoc.md
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------------------------------------------------------------------------------->
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`date.add()` adds a duration to a time value and returns the resulting time value.
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##### Function type signature
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```js
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(d: duration, to: A, ?location: {zone: string, offset: duration}) => time where A: Timeable
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```
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{{% caption %}}
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For more information, see [Function type signatures](/flux/v0/function-type-signatures/).
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{{% /caption %}}
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## Parameters
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### d
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({{< req >}})
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Duration to add.
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### to
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({{< req >}})
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Time to add the duration to.
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### location
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Location to use for the time value.
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Use an absolute time or a relative duration.
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Durations are relative to `now()`.
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## Examples
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- [Add six hours to a timestamp](#add-six-hours-to-a-timestamp)
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- [Add one month to yesterday](#add-one-month-to-yesterday)
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- [Add six hours to a relative duration](#add-six-hours-to-a-relative-duration)
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### Add six hours to a timestamp
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```js
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import "date"
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date.add(d: 6h, to: 2019-09-16T12:00:00Z)// Returns 2019-09-16T18:00:00.000000000Z
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```
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### Add one month to yesterday
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A time may be represented as either an explicit timestamp
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or as a relative time from the current `now` time. add can
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support either type of value.
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```js
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import "date"
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option now = () => 2021-12-10T16:27:40Z
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date.add(d: 1mo, to: -1d)// Returns 2022-01-09T16:27:40Z
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```
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### Add six hours to a relative duration
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```js
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import "date"
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option now = () => 2022-01-01T12:00:00Z
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date.add(d: 6h, to: 3h)// Returns 2022-01-01T21:00:00.000000000Z
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```
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