Eve was wrong or?

Justice
Did anyone period change this month as well? <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> gives me a different starting date every month and this month it did as well but it was wrong? It started on the same day it did last month..... Its weird and the app told me I was late. I'm just happy it's on :)