Trayodashi (त्रयोदशी) dates and timings in San Francisco for 2026
Verified astronomical start and end times for lunar day 13 in San Francisco, shown in America/Los_Angeles.
13 occurrences found. Each end time is exclusive: the next Tithi begins at that instant.
| # | Starts | Ends | Duration | Crosses midnight |
|---|---|---|---|---|
| 1 | 31 Dec 2025, 12:18 pm GMT-8 | 1 Jan 2026, 8:52 am GMT-8 | 20 hr 34 min | Yes |
| 2 | 29 Jan 2026, 9:39 pm GMT-8 | 30 Jan 2026, 6:56 pm GMT-8 | 21 hr 16 min | Yes |
| 3 | 28 Feb 2026, 7:13 am GMT-8 | 1 Mar 2026, 5:39 am GMT-8 | 22 hr 26 min | Yes |
| 4 | 29 Mar 2026, 6:40 pm GMT-7 | 30 Mar 2026, 6:26 pm GMT-7 | 23 hr 46 min | Yes |
| 5 | 28 Apr 2026, 6:22 am GMT-7 | 29 Apr 2026, 7:22 am GMT-7 | 25 hr 0 min | Yes |
| 6 | 27 May 2026, 7:27 pm GMT-7 | 28 May 2026, 9:21 pm GMT-7 | 25 hr 54 min | Yes |
| 7 | 26 Jun 2026, 9:52 am GMT-7 | 27 Jun 2026, 12:13 pm GMT-7 | 26 hr 21 min | Yes |
| 8 | 26 Jul 2026, 1:28 am GMT-7 | 27 Jul 2026, 3:45 am GMT-7 | 26 hr 17 min | Yes |
| 9 | 24 Aug 2026, 5:51 pm GMT-7 | 25 Aug 2026, 7:29 pm GMT-7 | 25 hr 38 min | Yes |
| 10 | 23 Sept 2026, 10:21 am GMT-7 | 24 Sept 2026, 10:48 am GMT-7 | 24 hr 28 min | Yes |
| 11 | 23 Oct 2026, 2:06 am GMT-7 | 24 Oct 2026, 1:07 am GMT-7 | 23 hr 1 min | Yes |
| 12 | 21 Nov 2026, 3:27 pm GMT-8 | 22 Nov 2026, 1:07 pm GMT-8 | 21 hr 41 min | Yes |
| 13 | 21 Dec 2026, 4:06 am GMT-8 | 22 Dec 2026, 12:54 am GMT-8 | 20 hr 47 min | Yes |
How these timings are calculated
BDA calculates the geocentric angular separation of the Moon and Sun and divides the full cycle into 30 equal 12-degree Tithi sectors. UTC boundaries are converted to the timezone resolved from the listed city coordinates.
Scope: These are astronomical Tithi spans only. This page does not choose a festival, Vrat, Parana, or Muhurta date. Those decisions require their separately certified sunrise-prevalence and observance rules.
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