With the App Event Mover you can move events in the iOS calendar, assign other calendars, give a new title, or change alerts. And that with many events at once, because you can add search patterns, e.g. to move all events that contain a certain string in the title and that belong to a particular calendar one day to 7:00 clock, and to set an alert 10 minutes earlier.

For example you have subscribed to a calendar which show you what day the trash is picked up. The events of this calendar are all-Day events, and do not give an alert. You want already put the garbage out the night before the collection take place. Event Mover can move all future garbage dates to 20:00 on the previous day, give them a time of 2 minutes, and an alert one hour before and an alert 5 minutes before.
Another usage: You have many dates in your "private" calendar, and you want assign all contained holiday events of the future to an "holiday" calendar.

It's best to add some test events and play with Event Mover to find out the manifold possibilities.

* Unlimited number of templates for search patterns and actions
* Filter by event title or contained string
* Filter for the associated calendar
* Automatic change of event title, start time and duration, and alerts.
* Automatic assignment of events to a different calendar
* Recurring events can be left untouched