Two suggestions for what date to start your 12 days of Christmas
Option 1: Count down to Christmas (ending on Dec 24)
This is the traditional advent style — counting down to Christmas Day.
Start date: December 13
Last treat: December 24 (Christmas Eve)
This fits nicely with the idea of building excitement leading up to Christmas.
Option 2: Start on Christmas Day (12 days of Christmas)
If your theme is “The 12 Days of Christmas” (as in the song), it refers to the period starting on Christmas Day.
Start date: December 25 (Christmas Day)
Last treat: January 5 (the eve of Epiphany, sometimes called Twelfth Night)
This version celebrates after Christmas and can feel like a fun way to extend the holiday joy.