Trayodashi (त्रयोदशी) dates and timings in Perth for 1917
Verified astronomical start and end times for lunar day 13 in Perth, shown in Australia/Perth.
13 occurrences found. Each end time is exclusive: the next Tithi begins at that instant.
| # | Starts | Ends | Duration | Crosses midnight |
|---|---|---|---|---|
| 1 | 5 Jan 1917, 10:29 am GMT+9 | 6 Jan 1917, 12:12 pm GMT+9 | 25 hr 43 min | Yes |
| 2 | 4 Feb 1917, 4:29 am GMT+9 | 5 Feb 1917, 7:05 am GMT+9 | 26 hr 36 min | Yes |
| 3 | 5 Mar 1917, 11:52 pm GMT+9 | 7 Mar 1917, 2:29 am GMT+9 | 26 hr 38 min | Yes |
| 4 | 4 Apr 1917, 5:40 pm GMT+8 | 5 Apr 1917, 7:32 pm GMT+8 | 25 hr 52 min | Yes |
| 5 | 4 May 1917, 10:29 am GMT+8 | 5 May 1917, 11:08 am GMT+8 | 24 hr 39 min | Yes |
| 6 | 3 Jun 1917, 12:46 am GMT+8 | 4 Jun 1917, 12:07 am GMT+8 | 23 hr 21 min | Yes |
| 7 | 2 Jul 1917, 12:44 pm GMT+8 | 3 Jul 1917, 10:54 am GMT+8 | 22 hr 10 min | Yes |
| 8 | 31 Jul 1917, 10:48 pm GMT+8 | 1 Aug 1917, 8:01 pm GMT+8 | 21 hr 14 min | Yes |
| 9 | 30 Aug 1917, 7:29 am GMT+8 | 31 Aug 1917, 4:06 am GMT+8 | 20 hr 37 min | Yes |
| 10 | 28 Sept 1917, 3:23 pm GMT+8 | 29 Sept 1917, 11:51 am GMT+8 | 20 hr 28 min | Yes |
| 11 | 27 Oct 1917, 11:18 pm GMT+8 | 28 Oct 1917, 8:11 pm GMT+8 | 20 hr 53 min | Yes |
| 12 | 26 Nov 1917, 8:10 am GMT+8 | 27 Nov 1917, 6:00 am GMT+8 | 21 hr 51 min | Yes |
| 13 | 25 Dec 1917, 6:53 pm GMT+8 | 26 Dec 1917, 6:07 pm GMT+8 | 23 hr 14 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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