Rosh Hashanah is the first and second days of the first Jewish month of Tishrei. It marks the beginning of the Jewish new year. The celebration of this holiday is marked with solemnity, as it is the day on which the whole world is judged for the coming year. Rosh Hashanah is the birthday of the world, as it was on this day that God created Man on the 6th day of creation.
Note: The Jewish calendar date begins at sundown of the night beforehand. Thus all holiday observances begin at sundown on the secular dates listed, with the following day being the first full day of the holiday. Jewish calendar dates conclude at nightfall.