Trayodashi (त्रयोदशी) dates and timings in Perth for 1979
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 | 10 Jan 1979, 9:13 am GMT+8 | 11 Jan 1979, 10:53 am GMT+8 | 25 hr 40 min | Yes |
| 2 | 9 Feb 1979, 2:56 am GMT+8 | 10 Feb 1979, 5:24 am GMT+8 | 26 hr 28 min | Yes |
| 3 | 10 Mar 1979, 10:02 pm GMT+8 | 12 Mar 1979, 12:38 am GMT+8 | 26 hr 37 min | Yes |
| 4 | 9 Apr 1979, 4:52 pm GMT+8 | 10 Apr 1979, 6:50 pm GMT+8 | 25 hr 58 min | Yes |
| 5 | 9 May 1979, 9:52 am GMT+8 | 10 May 1979, 10:34 am GMT+8 | 24 hr 42 min | Yes |
| 6 | 8 Jun 1979, 12:07 am GMT+8 | 8 Jun 1979, 11:21 pm GMT+8 | 23 hr 14 min | No |
| 7 | 7 Jul 1979, 11:41 am GMT+8 | 8 Jul 1979, 9:38 am GMT+8 | 21 hr 57 min | Yes |
| 8 | 5 Aug 1979, 9:17 pm GMT+8 | 6 Aug 1979, 6:20 pm GMT+8 | 21 hr 3 min | Yes |
| 9 | 4 Sept 1979, 5:46 am GMT+8 | 5 Sept 1979, 2:24 am GMT+8 | 20 hr 37 min | Yes |
| 10 | 3 Oct 1979, 1:56 pm GMT+8 | 4 Oct 1979, 10:33 am GMT+8 | 20 hr 38 min | Yes |
| 11 | 1 Nov 1979, 10:20 pm GMT+8 | 2 Nov 1979, 7:24 pm GMT+8 | 21 hr 4 min | Yes |
| 12 | 1 Dec 1979, 7:33 am GMT+8 | 2 Dec 1979, 5:29 am GMT+8 | 21 hr 55 min | Yes |
| 13 | 30 Dec 1979, 6:16 pm GMT+8 | 31 Dec 1979, 5:26 pm GMT+8 | 23 hr 10 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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