Baskin-Robbins “31®” means different ice cream flavors for each day of the month. Enjoy different flavor adventures with every visit to Baskin-Robbins! It started in 1947 in California, USA, when two brothers-in-law, Irvine “Irv” Robbins and Burton “Burt” Baskin, decided to team up and give birth to “Baskin Robbins.” They strongly believe that people should have a choice, so they offered 31 flavors.