The coupons are not valid on national holidays or on state-specific holidays based on the location of the respective restaurant. They also do not apply on Easter Sunday, Whitsun, Mother's Day, Valentine's Day and in the period from 24.12. up to and including 01.01. as well as during company holidays and rest days of the restaurant.
The coupons also do not have to be recognized at special events and private party.
You can find the coupon rules here:
mobile-gutscheine.de/einloeseregeln