how to sync calendar on iPad and iPhone

Hi nutso1,

For help with syncing third-party calendar accounts with your iPhone, test the steps below found in the article here: Set up multiple calendars on iPhone

"Set up iCloud, Google, Exchange, or Yahoo calendar accounts

1. Go to Settings  > Calendar > Accounts > Add Account.
2. Do any of the following:

• Tap a mail service (iCloud, Microsoft Exchange, or Google, for example), then sign in.
• Tap Other, tap Add CalDAV Account or Add Subscribed Calendar, then enter your server and account information."

You can also find helpful information from the Google Support website here: Add Google Calendar events to Apple Calendar

If needed refresh your information with the steps in the section "Refresh your contacts and calendars" here: If your iCloud Contacts, Calendars, or Reminders won’t sync

Cheers.