Hey the other i was looking through my dividends and i find one day missing

PAY TIME                   DIVIDENDS DATE         DIVIDENDS AMOUNT

2015-02-02 23:59:03   20150202                  0.00519 mBTC/GHS   

2015-02-01 23:59:03   20150201                  0.00517 mBTC/GHS       day 01  pay the day 01
   
2015-01-31 23:59:02   20150130                  0.00551 mBTC/GHS   day 30  pay the day 31

2015-01-30 23:59:03   20150129                  0.00512 mBTC/GHS   day 29 pay the day 30

2015-01-28 23:59:03   20150128                  0.00617 mBTC/GHS   day 28  pay the day 28

so where is the dividends for the 31 ?