Summary of Tishrei
The month Tishrei begins the autumn season. The three autumn months—Tishrei, Cheshvan, Kislev—correspond to the three tribes of the camp of Ephraim—Ephraim, Manasseh, Benjamin—which were situated to the west of the Tabernacle.
In the Bible, Tishrei is “the month of the strong” or “the month of the ancients.” With respect to the reckoning of years, Tishrei is the first month of the year. In the reckoning of the months, Tishrei is the seventh month, the month of completion and perfection.