Usual number of days in your period:

2 / 2015

MonTueWedThuFriSatSun
            1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28  

3 / 2015

MonTueWedThuFriSatSun
            1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 31          

4 / 2015

MonTueWedThuFriSatSun
    1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30      

Click on a date on the calendar to mark the first day of your last period.

Blue squares show periods saved in your history. Click here if you want to clear the history.