What are subscription anchor dates?
Anchor dates are an optional add-on to Subscription Programs that set a day on which billing interval calculations should be made + schedule specific product ship dates.
If you select a Week Day or Month Day from the dropdown, you'll also be presented with the option to add an optional Cutoff Day and determine subscription behavior Pre-Anchor:
A cutoff day is how many days in advance of the delivery anchor the order would need to be placed in order to qualify for the next delivery cycle.
Pre-Anchor Behavior is the possible fulfillment of the first order when placed within the cutoff. ASAP means orders placed inside a cutoff can be fulfilled or delivered by the next anchor. NEXT means orders placed inside a cutoff can be fulfilled or delivered at the following anchor.