2005 was a Common year that started on a Saturday in the Gregorian calendar. It was the 2005th year of the Common Era or Anno Domini designation the 5th year of the 3rd millennium and the 21st century and the 6th of the 2000s decade. 2005 was designated the: The Year of the Volunteer by the UK government. The World Year of Physics by the International Union of Pure and Applied Physics. The International Year of the Eucharist in Catholicism.