Start of the period	End of the period	Due date
January	2010-02-01	2011-01-31	2011-05-02
February	2010-03-01	2011-02-28	2011-05-31
March	2010-04-01	2011-03-31	2011-06-30
April	2010-05-01	2011-04-30	2011-08-01
May	2010-06-01	2011-05-31	2011-08-31
June	2010-07-01	2011-06-30	2011-09-30
July	2010-08-01	2011-07-31	2011-10-31
August	2010-09-01	2011-08-31	2011-11-30
September	2010-10-01	2011-09-30	2012-01-04
October	2010-11-01	2011-10-31	2012-01-31
November	2010-12-01	2011-11-30	2012-02-29
December	2011-01-01	2011-12-31	2012-04-02