When you import contacts, their birthdays are not automatically added to the calendar as they are when you create a new contact manually or edit existing contacts.
You have three options:
1. Open and save each contact
2. Use VBA code (//www.outlookcode.com/d/code/remindbday.htm)
3. Use a utility: Rebuild Birthdays and Anniversaries
From Adding Birthdays and Anniversaries to the Calendar Adding Birthdays and Anniversaries to Outlook’s Calendar
Published March 17, 2010. Last updated on June 7, 2021.
![Diane Poremsky [Outlook MVP]](http://www.outlook-tips.net/images/2014/MVP_BlueOnly.png)
