Holidays calendar April 2011‹ March 2011May 2011 ›DatePopular holidaysOther holidays and observances1 FridayInternational Bird Day2 SaturdayInternational Children's Book Day,International Pillow Fight Day,World Autism Awareness Day3 SundayMother's Day4 MondayWorld Allergy Week,World Stray Animals Day,International Carrot Day,World Rat Day,International Day for Mine Awareness and Assistance in Mine Action5 TuesdayWorld Allergy Week,Good Deeds Day6 WednesdayWorld Allergy Week7 ThursdayWorld Allergy Week,International Beaver Day,International Day of Reflection on the 1994 Genocide against the Tutsi in Rwanda ,World Health Day8 FridayWorld Allergy Week,International GMO Opposition Day,International Romani Day9 SaturdayWorld Allergy Week10 SundayWorld Allergy Week11 MondayWorld Parkinson's Day12 TuesdayYuri's Night,International Day of Human Space Flight13 Wednesday14 Thursday15 FridayWorld Art Day16 SaturdayInternational Day against Child Slavery,World Circus Day,Husband Appreciation Day17 SundayWorld Hemophilia Day18 MondayInternational Day for Monuments and Sites,World Amateur Radio Day,Global Action Week For Education19 TuesdayGlobal Action Week For Education20 WednesdayGlobal Action Week For Education,Chinese Language Day21 ThursdayGlobal Action Week For Education22 FridayGood FridayEarth Day,Global Action Week For Education,International Mother Earth Day23 SaturdaySt. George's DayWorld Immunization Week,Global Action Week For Education,English Language Day,World Book and Copyright Day,Spanish Language Day,Shakespeare Day24 SundayEaster SundayWorld Immunization Week,International Youth Solidarity Day,World Meningitis Day,International Search and Rescue Dog Day,Global Action Week For Education,World Day For Animals In Laboratories25 MondayEaster MondayWorld Immunization Week,World Penguin Day,Parental Alienation Awareness Day,International Noise Awareness Day,DNA Day,World Malaria Day26 TuesdayWorld Immunization Week,World Intellectual Property Day27 WednesdayWorld Immunization Week,World Graphics Day,Morse Code Day,World Tapir Day28 ThursdayWorld Immunization Week,Workers' Memorial Day,World Day for Safety and Health at Work,International Girls in ICT Day29 FridayThe wedding of Prince William and Catherine MiddletonWorld Immunization Week,International Day of Immunology,International Dance Day30 SaturdayWorld Veterinary Day,Spank Out Day,Honesty DaySuccess!Error!