# addToDateTime

Adds an amount of time to a datetime.

## Arguments

1. Unit to add as a string:
   * Year, Years, Y or u for years
   * Month, Months, M or L for months
   * Week, Weeks or W for weeks
   * Day, Days or d for days
   * Hour, Hours or H for hours
   * Minute, Minutes or m for minutes
   * Second, Seconds or s for seconds
   * Millisecond, Milliseconds or A for milliseconds
2. Amount to add as a long. It can be a negative value to subtract an amount of time.
3. Input datetime.

## Examples

| Expression | Result |
| --- | --- |
| addToDateTime("M", -1,<br>"2021-03-21T10:19:26.214+02:00") | 2021-02-21T10:19:26.214+02:00 |