why does the calendar delete past events?

Hello 123Giblet,

The iPhone has a setting for how long a past event will appear in your calendar. I found steps to help you change this setting in the iPhone User Guide:

Calendar settings

There are several settings in Settings > Mail, Contacts, Calendars that affect Calendar and your calendar accounts. These include:

•Syncing of past events (future events are always synced)

•Alert tone played for new meeting invitations

•Calendar time zone support, to show dates and times using a different time zone

When you tap on Sync, you will be given several options for how long you want past events to stay on your iPhone, and there is also an option to select All Events so that they remain on your calendar. You can find this information on page 69 of the iPhone User Guide

iPhone User Guide

http://manuals.info.apple.com/en_US/iphone_user_guide.pdf

Thank you for posting in the Apple Support Communities.

Best,

Sheila M.