Feast of Trumpets (Leviticus 23:23-25)

"And the LORD spoke to Moses, saying, 'Speak to the people of Israel, saying, In the seventh month, on the first day of the month, you shall observe a day of solemn rest, a memorial proclaimed with blast of trumpets, a holy convocation. You shall not do any ordinary work, and you shall present a food offering to the LORD.'"