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 Stray Animals Day,World Allergy Week,World Rat Day,International Carrot 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 SaturdayWorld Circus Day,International Day against Child Slavery,Husband Appreciation Day17 SundayWorld Hemophilia Day18 MondayWorld Amateur Radio Day,International Day for Monuments and Sites,Global Action Week For Education19 TuesdayGlobal Action Week For Education20 WednesdayChinese Language Day,Global Action Week For Education21 ThursdayGlobal Action Week For Education22 FridayGood FridayEarth Day,Global Action Week For Education,International Mother Earth Day23 SaturdaySt. George's DayWorld Immunization Week,World Book and Copyright Day,Spanish Language Day,Global Action Week For Education,English Language Day,Shakespeare Day24 SundayEaster SundayWorld Meningitis Day,World Immunization Week,International Youth Solidarity Day,International Search and Rescue Dog Day,Global Action Week For Education,World Day For Animals In Laboratories25 MondayEaster MondayParental Alienation Awareness Day,World Immunization Week,International Noise Awareness Day,DNA Day,World Penguin Day,World Malaria Day26 TuesdayWorld Immunization Week,World Intellectual Property Day27 WednesdayWorld Graphics Day,Morse Code Day,World Tapir Day,World Immunization Week28 ThursdayWorkers' Memorial Day,World Immunization Week,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 SaturdaySpank Out Day,World Veterinary Day,Honesty DaySuccess!Error!