From which Saturday on the blister should I start using Belara?

Good morning, I changed the tablets from Vibin to Belara. After a 7-day vibin wind, I took the first tablet of belar. My question is - does it matter which pill I start with? Biorac vibin I stuck a sticker with the days of the week. I always start from Saturday, in the belara days of the week are already written on the blister. Does it matter from which signed Saturday I take the tablet. I'm not sure if I'm doing it right. Thank you greetings :)