When the molad of Tishri occurs at a time of the week that is unaffected by the four postponement rules below, the Feast of Trumpets is on the same day as the molad.
When the molad of Tishri occurs at noon or later (18h 0p), the Feast of Trumpets is postponed until the next day.
When the molad of Tishri or a postonement occurs on a Sunday, Wednesday or Friday, the Feast of Trumpets is postponed one day, to a Monday, Thursday or Sabbath respectively.
When the molad of Tishri of a common year occurs on a Tuesday, at or after (3d) 9h 204p, the Feast of Trumpets is postponed to a Wednesday, and by Rule 2, further postponed to a Thursday.
When the molad of Tishri of a common year immediately following an intercalary year occurs on a Monday after (2d) 15h 589p, the Feast of Trumpets is postponed to a Tuesday.