The molad does not necessarily coincide with the first day of a Hebrew month. The molad can arrive as early, and no earlier, than the 28th day of a closing Hebrew month, and it can be as late as, but no later, than the close of the first day of a new Hebrew month.
The molad can arrive no earlier than 28d;3h;340p in any given Hebrew month.
This earliest possible molad will first occur on the 28th day of Tevet 193,150H.
The molad can precede the first day of a new month by a maximum of 2d;9h;453p.
This maximum separation between the molad and the new month will first occur on the 28th day of Kislev 193,150H.
It is interesting to note that both of these two phenomenas take place one immediately after the other in the same 355 day Hebrew year.
The moladot for that Hebrew year, and their corresponding Gregorian dates are shown below.
| The Moladot For 193150H | ||
|---|---|---|
| Month | Moment of Molad | First Day Chodesh |
| Tishrei | Fri 0h 22m 12hl |
Sat 17 Dec 189391g |
| Heshvan | Sat 13h 6m 13hl |
*Mon 16 Jan 189392g |
| Kislev | Mon 1h 50m 14hl |
*Wed 15 Feb 189392g |
| Tevet | Tue 14h 34m 15hl |
*Fri 16 Mar 189392g |
| Shevat | Thu 3h 18m 16hl |
Sat 14 Apr 189392g |
| Adar | Fri 16h 2m 17hl |
*Mon 14 May 189392g |
| Nisan | Sun 4h 47m 0hl |
Tue 12 Jun 189392g |
| Iyar | Mon 17h 31m 1hl |
*Thu 12 Jul 189392g |
| Sivan | Wed 6h 15m 2hl |
Fri 10 Aug 189392g |
| Tammuz | Thu 18h 59m 3hl |
*Sun 9 Sep 189392g |
| Av | Sat 7h 43m 4hl |
Mon 8 Oct 189392g |
| Elul | Sun 20h 27m 5hl |
*Wed 7 Nov 189392g |
The time of the molad cannot be any later than 23h;23m;8hl of the first day of any month.
This amazing feature of the Hebrew calendar is fully analyzed in the Additional Notes which deal with The Overpost Problem.
Assuming no changes to either the Hebrew or the Gregorian calendars, then this maximum time will first occur on the first day of Shevat 128,459H.
The moladot for that Hebrew year, and their corresponding Gregorian dates are shown below.
| The Moladot For 128459H | ||
|---|---|---|
| Month | Moment of Molad | First Day Chodesh |
| Tishrei | Sun 20h 27m 4hl |
Mon 26 Feb 124700g |
| Heshvan | Tue 9h 11m 5hl |
*Wed 28 Mar 124700g |
| Kislev | Wed 21h 55m 6hl |
Thu 26 Apr 124700g |
| Tevet | Fri 10h 39m 7hl |
Fri 25 May 124700g |
| Shevat | Sat 23h 23m 8hl |
Sat 23 Jun 124700g |
| Adar | Mon 12h 7m 9hl |
*Mon 23 Jul 124700g |
| v'Adar | Wed 0h 51m 10hl |
*Wed 22 Aug 124700g |
| Nisan | Thu 13h 35m 11hl |
Thu 20 Sep 124700g |
| Iyar | Sat 2h 19m 12hl |
*Sat 20 Oct 124700g |
| Sivan | Sun 15h 3m 13hl |
Sun 18 Nov 124700g |
| Tammuz | Tue 3h 47m 14hl |
*Tue 18 Dec 124700g |
| Av | Wed 16h 31m 15hl |
Wed 16 Jan 124701g |
| Elul | Fri 5h 15m 16hl |
*Fri 15 Feb 124701g |
First Paged 6 May 1998 Next Revised 25 May 1998