Trayodashi (त्रयोदशी) dates and timings in Perth for 1921
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 | 21 Jan 1921, 6:22 pm GMT+8 | 22 Jan 1921, 2:51 pm GMT+8 | 20 hr 30 min | Yes |
| 2 | 20 Feb 1921, 4:01 am GMT+8 | 21 Feb 1921, 12:32 am GMT+8 | 20 hr 31 min | Yes |
| 3 | 21 Mar 1921, 12:19 pm GMT+8 | 22 Mar 1921, 9:26 am GMT+8 | 21 hr 8 min | Yes |
| 4 | 19 Apr 1921, 8:12 pm GMT+8 | 20 Apr 1921, 6:23 pm GMT+8 | 22 hr 11 min | Yes |
| 5 | 19 May 1921, 4:41 am GMT+8 | 20 May 1921, 4:08 am GMT+8 | 23 hr 27 min | Yes |
| 6 | 17 Jun 1921, 2:32 pm GMT+8 | 18 Jun 1921, 3:13 pm GMT+8 | 24 hr 41 min | Yes |
| 7 | 17 Jul 1921, 2:20 am GMT+8 | 18 Jul 1921, 4:00 am GMT+8 | 25 hr 41 min | Yes |
| 8 | 15 Aug 1921, 4:22 pm GMT+8 | 16 Aug 1921, 6:40 pm GMT+8 | 26 hr 18 min | Yes |
| 9 | 14 Sept 1921, 8:39 am GMT+8 | 15 Sept 1921, 11:04 am GMT+8 | 26 hr 25 min | Yes |
| 10 | 14 Oct 1921, 2:42 am GMT+8 | 15 Oct 1921, 4:35 am GMT+8 | 25 hr 53 min | Yes |
| 11 | 12 Nov 1921, 9:21 pm GMT+8 | 13 Nov 1921, 10:05 pm GMT+8 | 24 hr 44 min | Yes |
| 12 | 12 Dec 1921, 3:08 pm GMT+8 | 13 Dec 1921, 2:22 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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