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When is Monday the 21st?

How often does the 21st day of a month fall on a Monday.

Monday the 21st occurrences
YearDateMonthSince lastComment
2010Monday, June 21, 2010June1 time in year 2010
2011Monday, February 21, 2011February+ 8 months3 times in year 2011
Monday, March 21, 2011March+ 1 months 
Monday, November 21, 2011November+ 8 months 
2012Monday, May 21, 2012May+ 6 months1 time in year 2012
2013Monday, January 21, 2013January+ 8 months2 times in year 2013
Monday, October 21, 2013October+ 9 months 
2014Monday, April 21, 2014April+ 6 months2 times in year 2014
Monday, July 21, 2014July+ 3 months 
2015Monday, September 21, 2015September+ 14 months2 times in year 2015
Monday, December 21, 2015December+ 3 months 
2016Monday, March 21, 2016March+ 3 months2 times in year 2016
Monday, November 21, 2016November+ 8 months 
2017Monday, August 21, 2017August+ 9 months1 time in year 2017
2018Monday, May 21, 2018May+ 9 months1 time in year 2018
2019Monday, January 21, 2019January+ 8 months2 times in year 2019
Monday, October 21, 2019October+ 9 months 
2020Monday, September 21, 2020September+ 11 months2 times in year 2020
Monday, December 21, 2020December+ 3 months 
Between years 2010 and 2020 this occurs 19 times. Upcoming occurrence is highlighted.

Extended list from 2010 to 2050

Which years have the same weekdays?

Calendars repeat themselves – find out which years share the same calendar dates and reuse your calendar.

Which months have the same weekdays?

Calendars repeat themselves – find out which months share the same calendar dates and reuse your calendar.

When does a date fall on a certain weekday?

Do you feel dates like Friday the 13th occur often? Our service tells you exactly when.


When is the next occurrence of

Which years use the same calendar

Which months are the same

Date Calculators

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