When:
January 14, 2021 all-day
2021-01-14T00:00:00+00:00
2021-01-15T00:00:00+00:00

Beginning of new Hebrew month of Sh’vat. Sh’vat (sometimes transliterated Shevat) is the 11th month of the Hebrew year. Corresponds to January or February on the Gregorian calendar

https://www.hebcal.com/holidays/rosh-chodesh-shvat-2021?utm_source=js&utm_medium=icalendar