Trayodashi (त्रयोदशी) dates and timings in Perth for 1987
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 1987, 2:58 am GMT+8 | 13 Jan 1987, 5:33 am GMT+8 | 26 hr 35 min | Yes |
| 2 | 10 Feb 1987, 10:55 pm GMT+8 | 12 Feb 1987, 1:14 am GMT+8 | 26 hr 19 min | Yes |
| 3 | 12 Mar 1987, 6:17 pm GMT+8 | 13 Mar 1987, 7:45 pm GMT+8 | 25 hr 29 min | Yes |
| 4 | 11 Apr 1987, 11:40 am GMT+8 | 12 Apr 1987, 11:54 am GMT+8 | 24 hr 14 min | Yes |
| 5 | 11 May 1987, 2:11 am GMT+8 | 12 May 1987, 1:02 am GMT+8 | 22 hr 51 min | Yes |
| 6 | 9 Jun 1987, 1:38 pm GMT+8 | 10 Jun 1987, 11:13 am GMT+8 | 21 hr 35 min | Yes |
| 7 | 8 Jul 1987, 10:26 pm GMT+8 | 9 Jul 1987, 7:09 pm GMT+8 | 20 hr 43 min | Yes |
| 8 | 7 Aug 1987, 5:33 am GMT+8 | 8 Aug 1987, 1:56 am GMT+8 | 20 hr 23 min | Yes |
| 9 | 5 Sept 1987, 12:10 pm GMT+8 | 6 Sept 1987, 8:47 am GMT+8 | 20 hr 37 min | Yes |
| 10 | 4 Oct 1987, 7:26 pm GMT+8 | 5 Oct 1987, 4:49 pm GMT+8 | 21 hr 22 min | Yes |
| 11 | 3 Nov 1987, 4:21 am GMT+8 | 4 Nov 1987, 2:50 am GMT+8 | 22 hr 29 min | Yes |
| 12 | 2 Dec 1987, 3:34 pm GMT+8 | 3 Dec 1987, 3:20 pm GMT+8 | 23 hr 46 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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