Q: Is there a way to not have my calendar entries delete from my calendar on my iPad and iPhone. I would like them to stay until I delete them. Sometimes I need to check past events 2 years or more back. In the Palm OS days I had more control over my calendar retention. In addition to the basic calendar I also use Pocket Informant. - Denise A: By default, the iOS Calendars app only synchronizes and retains the last months’ worth of events on…