Trayodashi (त्रयोदशी) dates and timings in Perth for 1971
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 | 8 Jan 1971, 8:05 pm GMT+8 | 9 Jan 1971, 8:03 pm GMT+8 | 23 hr 57 min | Yes |
| 2 | 7 Feb 1971, 10:23 am GMT+8 | 8 Feb 1971, 11:45 am GMT+8 | 25 hr 23 min | Yes |
| 3 | 9 Mar 1971, 2:58 am GMT+8 | 10 Mar 1971, 5:21 am GMT+8 | 26 hr 23 min | Yes |
| 4 | 7 Apr 1971, 8:45 pm GMT+8 | 8 Apr 1971, 11:24 pm GMT+8 | 26 hr 38 min | Yes |
| 5 | 7 May 1971, 2:18 pm GMT+8 | 8 May 1971, 4:24 pm GMT+8 | 26 hr 7 min | Yes |
| 6 | 6 Jun 1971, 6:27 am GMT+8 | 7 Jun 1971, 7:32 am GMT+8 | 25 hr 4 min | Yes |
| 7 | 5 Jul 1971, 8:50 pm GMT+8 | 6 Jul 1971, 8:40 pm GMT+8 | 23 hr 50 min | Yes |
| 8 | 4 Aug 1971, 9:32 am GMT+8 | 5 Aug 1971, 8:09 am GMT+8 | 22 hr 37 min | Yes |
| 9 | 2 Sept 1971, 8:51 pm GMT+8 | 3 Sept 1971, 6:24 pm GMT+8 | 21 hr 33 min | Yes |
| 10 | 2 Oct 1971, 7:03 am GMT+8 | 3 Oct 1971, 3:50 am GMT+8 | 20 hr 46 min | Yes |
| 11 | 31 Oct 1971, 4:27 pm GMT+8 | 1 Nov 1971, 12:54 pm GMT+8 | 20 hr 27 min | Yes |
| 12 | 30 Nov 1971, 1:29 am GMT+8 | 30 Nov 1971, 10:11 pm GMT+8 | 20 hr 42 min | No |
| 13 | 29 Dec 1971, 10:50 am GMT+8 | 30 Dec 1971, 8:23 am GMT+8 | 21 hr 33 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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