Changing the day of the week

It is preferred if the mifepristone tablet is taken on the same weekday all year round, but it can be shifted. 

For example:
There is an urgent reason that, for example, taking mifepristone 50 mg on a Monday is difficult, then the mifepristone tablet can be taken after 6 days (on Sunday) the following week and again after 6 days (on Saturday) the following week, until the desired weekday is reached.