Added. Also added option for Rosh Chodesh.
Chodesh is for each chodesh starting with the start date. So if the start date is ten in Iyur the second check will be 10 in Sivan.
Rosh Chodesh will only you the first day of the chodesh. So even if the start date is 10 in Iyur, the first check will be 1 In Iyur and the second 1 In Sivan.