Trayodashi (त्रयोदशी) dates and timings in Perth for 1977
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 | 2 Jan 1977, 3:22 pm GMT+8 | 3 Jan 1977, 5:27 pm GMT+8 | 26 hr 5 min | Yes |
| 2 | 1 Feb 1977, 11:15 am GMT+8 | 2 Feb 1977, 12:05 pm GMT+8 | 24 hr 50 min | Yes |
| 3 | 3 Mar 1977, 4:45 am GMT+8 | 4 Mar 1977, 4:10 am GMT+8 | 23 hr 25 min | Yes |
| 4 | 1 Apr 1977, 7:14 pm GMT+8 | 2 Apr 1977, 5:23 pm GMT+8 | 22 hr 9 min | Yes |
| 5 | 1 May 1977, 6:40 am GMT+8 | 2 May 1977, 3:53 am GMT+8 | 21 hr 13 min | Yes |
| 6 | 30 May 1977, 3:27 pm GMT+8 | 31 May 1977, 12:05 pm GMT+8 | 20 hr 38 min | Yes |
| 7 | 28 Jun 1977, 10:14 pm GMT+8 | 29 Jun 1977, 6:43 pm GMT+8 | 20 hr 29 min | Yes |
| 8 | 28 Jul 1977, 4:03 am GMT+8 | 29 Jul 1977, 12:53 am GMT+8 | 20 hr 49 min | Yes |
| 9 | 26 Aug 1977, 10:12 am GMT+8 | 27 Aug 1977, 7:52 am GMT+8 | 21 hr 40 min | Yes |
| 10 | 24 Sept 1977, 6:06 pm GMT+8 | 25 Sept 1977, 5:03 pm GMT+8 | 22 hr 57 min | Yes |
| 11 | 24 Oct 1977, 5:00 am GMT+8 | 25 Oct 1977, 5:25 am GMT+8 | 24 hr 26 min | Yes |
| 12 | 22 Nov 1977, 7:30 pm GMT+8 | 23 Nov 1977, 9:14 pm GMT+8 | 25 hr 43 min | Yes |
| 13 | 22 Dec 1977, 1:16 pm GMT+8 | 23 Dec 1977, 3:44 pm GMT+8 | 26 hr 28 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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