Without knowing the current year, it is impossible to determine which Jewish holiday falls on a Monday. However, based on the search results, we can provide a list of Jewish holidays and their corresponding dates for the year 2023:

• Tu B’shevat - February 6
• Purim - March 7
• Pesach / Passover - April 5-13
• Yom Hashoah - April 18
• Yom Hazikaron - April 25
• Yom Ha’atzmaut - April 26
• Yom Yerushalayim - May 19
• Shavuot - May 26-27
• Rosh HaShanah - September 9-11
• Yom Kippur - September 18-19
• Sukkot - September 23-30
• Shemini Atzeret / Simchat Torah - October 1-2
• Hanukkah - December 12-20

Therefore, if the current year is 2023, Shemini Atzeret / Simchat Torah falls on a Monday (October 2).