Period Start not allowing older than today

[archerx]

I want to enter my period start date (= 5th March) but on 14th March, i.e. enter a date that lies in the past. But due to some recent update it isn't allowing me to do that. Weirdly, it's letting me enter a future date (?!). If this is intentional then it's really annoying. This is then making the period predictions incorrect and basically makes this cycle tracking feature useless. PLEASE ALLOW ENTERING PAST DATES, PERIOD!

[archerx]

Edit: in case it isn't clear: i want to enter period start date "05th March 2025" but record it in the app post-event, because I forgot to do it on 5th March. This post-event date is for e.g.14th March, i.e. 9 days after the actual period start Date. But the app is allowing period start date only from 14th March (i.e. the date of entry).