Trayodashi (त्रयोदशी) dates and timings in Perth for 1911
Verified astronomical start and end times for lunar day 13 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 | 12 Jan 1911, 3:47 pm GMT+8 | 13 Jan 1911, 12:38 pm GMT+8 | 20 hr 52 min | Yes |
| 2 | 11 Feb 1911, 1:15 am GMT+8 | 11 Feb 1911, 10:49 pm GMT+8 | 21 hr 34 min | No |
| 3 | 12 Mar 1911, 10:43 am GMT+8 | 13 Mar 1911, 9:24 am GMT+8 | 22 hr 41 min | Yes |
| 4 | 10 Apr 1911, 9:01 pm GMT+8 | 11 Apr 1911, 9:05 pm GMT+8 | 24 hr 3 min | Yes |
| 5 | 10 May 1911, 8:55 am GMT+8 | 11 May 1911, 10:18 am GMT+8 | 25 hr 22 min | Yes |
| 6 | 8 Jun 1911, 10:38 pm GMT+8 | 10 Jun 1911, 12:54 am GMT+8 | 26 hr 16 min | Yes |
| 7 | 8 Jul 1911, 1:49 pm GMT+8 | 9 Jul 1911, 4:20 pm GMT+8 | 26 hr 30 min | Yes |
| 8 | 7 Aug 1911, 5:51 am GMT+8 | 8 Aug 1911, 7:55 am GMT+8 | 26 hr 4 min | Yes |
| 9 | 5 Sept 1911, 10:06 pm GMT+8 | 6 Sept 1911, 11:14 pm GMT+8 | 25 hr 8 min | Yes |
| 10 | 5 Oct 1911, 2:09 pm GMT+8 | 6 Oct 1911, 2:04 pm GMT+8 | 23 hr 56 min | Yes |
| 11 | 4 Nov 1911, 5:35 am GMT+8 | 5 Nov 1911, 4:14 am GMT+8 | 22 hr 39 min | Yes |
| 12 | 3 Dec 1911, 7:51 pm GMT+8 | 4 Dec 1911, 5:21 pm GMT+8 | 21 hr 30 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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