There are various views on the calendar for Israel, and Chance explained a lot about it, a few months back:There are those who hold to only a 360 days/year calendar, i.e. 30 days/month.Over the years, like the common calendar, things could slip to different times of the year.Doesn't the common calendar have a correction table, to determine when to add a second month of Adar?However, there are those who hold to a strict lunar calendar, with no second month of Adar a times.That one really slips, where Passover would be at various times of the year, over the decades.I've asked people about that, and apparently they don't see it as a problem.However, I wondered about the following:
Exodus 34:22 And thou shalt observe the feast of weeks, of the firstfruits of wheat harvest, and the feast of ingathering at the year’s end.
The time of wheat harvest doesn't slip over the decades, it pretty much remains within its season.Wouldn't an occasional calendar correction, e.g. a second month of Adar, be needed to allow harvest time and the feast to be resynchronized?