We all should remember that Passover is a different Gentile
calendar day every year. The week Jesus was crucified, Passover began
Wednesday Sunset. This was the "day of preparation" when both the
Passover lamb and Jesus were killed.
Think about that!
   Every several years, the Jews add a month to their calendar to
align their 360 day Lunar year with the Gentile  Solar year Calendar.
Otherwise, the time for planting and harvest would get further and
further off! So, over the centuries, the Jewish and Solar calendars
would eventually coincide. That would also mean getting corresponding
dates would be difficult to get "right."