Trayodashi (त्रयोदशी) dates and timings in Perth for 1931
Verified astronomical start and end times for lunar day 28 in Perth, shown in Australia/Perth.
12 occurrences found. Each end time is exclusive: the next Tithi begins at that instant.
| # | Starts | Ends | Duration | Crosses midnight |
|---|---|---|---|---|
| 1 | 15 Jan 1931, 11:19 pm GMT+8 | 17 Jan 1931, 12:01 am GMT+8 | 24 hr 43 min | Yes |
| 2 | 14 Feb 1931, 2:47 pm GMT+8 | 15 Feb 1931, 4:37 pm GMT+8 | 25 hr 50 min | Yes |
| 3 | 16 Mar 1931, 8:02 am GMT+8 | 17 Mar 1931, 10:34 am GMT+8 | 26 hr 32 min | Yes |
| 4 | 15 Apr 1931, 2:04 am GMT+8 | 16 Apr 1931, 4:38 am GMT+8 | 26 hr 34 min | Yes |
| 5 | 14 May 1931, 7:34 pm GMT+8 | 15 May 1931, 9:24 pm GMT+8 | 25 hr 49 min | Yes |
| 6 | 13 Jun 1931, 11:21 am GMT+8 | 14 Jun 1931, 11:53 am GMT+8 | 24 hr 32 min | Yes |
| 7 | 13 Jul 1931, 12:51 am GMT+8 | 13 Jul 1931, 11:58 pm GMT+8 | 23 hr 6 min | No |
| 8 | 11 Aug 1931, 12:19 pm GMT+8 | 12 Aug 1931, 10:11 am GMT+8 | 21 hr 52 min | Yes |
| 9 | 9 Sept 1931, 10:24 pm GMT+8 | 10 Sept 1931, 7:26 pm GMT+8 | 21 hr 2 min | Yes |
| 10 | 9 Oct 1931, 7:48 am GMT+8 | 10 Oct 1931, 4:26 am GMT+8 | 20 hr 39 min | Yes |
| 11 | 7 Nov 1931, 5:00 pm GMT+8 | 8 Nov 1931, 1:42 pm GMT+8 | 20 hr 42 min | Yes |
| 12 | 7 Dec 1931, 2:21 am GMT+8 | 7 Dec 1931, 11:32 pm GMT+8 | 21 hr 11 min | No |
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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