Start of the period	End of the period	Due date
January	2012-01-01	2012-01-31	2012-02-29
February	2012-02-01	2012-02-29	2012-04-02
March	2012-03-01	2012-03-31	2012-04-30
April	2012-04-01	2012-04-30	2012-05-31
May	2012-05-01	2012-05-31	2012-07-03
June	2012-06-01	2012-06-30	2012-07-31
July	2012-07-01	2012-07-31	2012-08-31
August	2012-08-01	2012-08-31	2012-10-01
September	2012-09-01	2012-09-30	2012-10-31
October	2012-10-01	2012-10-31	2012-11-30
November	2012-11-01	2012-11-30	2013-01-03
December	2012-12-01	2012-12-31	2013-01-31