Adds ability to force subscription bill dates to a certain day of the month. 


Use Case: Companies that produce a physical subscription product on a monthly basis (example: print magazine) may prefer to collect subscription funds on the same day each month in order to both have funds available to purchase materials and to determine the quantity of product to produce that month.

For Example: Print Magazine company ships March's magazine during last week of February. Magazine content must be finalized and sent to printer by February 15th. Therefore, the print magazine company needs to charge all their subscribers on the 10th in order to be able to both clear funds and send to printer by the 15th and to know exactly how many magazines to print.