Use this tool to calculate how many years ago was 2013. Simply enter the date of today and then select the year in the past. You can also enter a number of months, for example 30/12 will equal to two and a half years.
11 years ago was a Tuesday. January 1st 2013 was in week 01 of the year 2013. January 1st, 2013, was a full moon. There were 575 weekends, and there were 435 weekdays.
Year 2013 (MMXIII) was a common year starting on Tuesday of the Gregorian calendar and a common year starting on Wednesday of the Julian calendar, both of which use the leap day method to determine the correct dates. This year was known for the release of confidential information regarding the NSA surveillance program; Typhoon Haiyan killed thousands in the Philippines and Southeast Asia; the Rana Plaza collapse killed over 1,000 people in Bangladesh; the streak from the Chelyabinsk meteor streaked across the morning sky; the Boston Marathon bombing and Efrain Alegre won the Paraguayan presidential election.
This page is a good place to start for anyone interested in learning more about the year 2013. You can also find out how long it has been since any other date, using the links above.