Is it okay if the date for the Wigobi injection is delayed by about a day?

It bothers me a little that I have to meet on the same day every week.

It is usually fine, but in weeks when the schedule changes, such as for travel or business trips
I think there might be situations where it is difficult to meet the set date.

Is it okay to adjust it by about a day?
Or I would like to know if it is important to maintain a set interval as much as possible.

If anyone has tried adjusting dates because their schedule got messed up while using it
If you let me know how you managed it, I will make a plan in advance.