What are the correct Festival Dates for 2021?

To All:

If aviv is located in or around Jerusalem during the official Israeli search on March 15 and the New Year is declared on that date, then Passover will fall on March 28. This means that the Lord’s Seder will be held the previous evening on March 27 which happens to be Saturday night.

The first day of unleavened bread (matzos) falls on March 29 and continues until April 4.

Shavuot (Pentecost) is May 23.

Trumpets (Yom Teruah/Rosh HaShana) is September 9 based on the sighting of New Moon which ought to occur evening of September 8 or 9 in Jerusalem.

Yom Kippurim is September 18 (conditioned on the above New Moon sighting)

Sukkot occurs September 23 and lasts 7 days

And the Last Great Day — Sh’mini Atzeret — falls September 30.