Many Jewish communities in the United States celebrate the first day of Sukkot (Succot, Succoth, Sukkoth), which is the start of the Sukkot period. This period, also known as the Feast of Tabernacles, lasts for about seven days. It is observed during the week starting on 15th day of Tishri (or Tishrei), which is the first month of the year in the Jewish calendar.