Calendar year
2013 (MMXIII) was a common year starting on Tuesday of the Gregorian calendar, the 2013th year of the Common Era (CE) and Anno Domini (AD) designations, the 13th year of the 3rd millennium and the 21st century, and the 4th year of the 2010s decade.
Calendar year
2013 was the first year since 1987 to contain four different digits (a span of 26 years).
2013 was designated as: