Add a duration to a datetime

Water Contract
<method datetime.plus a_duration=req/>

See also: duration, minus

Adds a_duration of type duration to the _subject of type datetime , giving a new datetime as the result.

Example: Adding two months to a datetime

<datetime 2006 08 16 0 0 0 0 />.<plus <duration months=2.0 /> />.<to_htm />

"Oct 16, 2006"