Posted: Sun Apr 4, 2021 11:56am
You should have no problem if you are back and forwards the easy way to know how long you can stay is
Know how long you have been in Spain (Really the EU open border area) over the last 180 days (Six months)
If it is 45 then you can can stop at lease 45 days, I think this will suit you from the description
If you had been in Spain exactly 180 days ago for 7 days then these would drop out of your time allowed,
so after 7 Days in Spain you can do the calculation again and that is the number of days you can stay, you just need to know how many over the last 6 months, more accurate method may be required if you are pushing in to the limit.
I think this is simpler than any other method i have seen.
Remember it is days not nights, holidays you refer to as 7 nights are 8 days light a coach trip