# Event::moveDates

> FullCalendar v4 documentation, for an old release. Web version: https://legacy.fullcalendar.io/v4/Event-moveDates
>
> Latest version (v7): https://fullcalendar.io/docs/Event-moveDates.md

Will move an event's `start` and `end` dates by a specific period of time.

<div class='spec' markdown='1'>
event.moveDates( *delta* )
</div>

`delta` is a [Duration](https://legacy.fullcalendar.io/v4/duration-object.md) or something that will parse into a Duration.

If there are other events that share the same `groupId`, those events' dates will be similarly modified.