According to HubNetwork, Pinkie Pie’s birthday is to(yester)day.

May 3rd. This date is derived from “A Friend In Deed” (2×18). Where Pinkie says: 75 Days after February 18th, 2012 (Original Airdate, Leap Year) is May 3rd. But what about “Party of One” (1×25), where Pinkie says: The episode aired April 29th, 2011, but since it this surprise party was held the next day […]