2012 instance of leap year
2012 (MMXII) was a leap year starting on Sunday of the Gregorian calendar, the 2012th year of the Common Era (CE) and Anno Domini (AD) designations, the 12th  year of the 3rd millennium and the 21st century, and the  3rd   year of the 2010s decade.  
2012 was designated as:
type of example of manifestation of representation of