Trayodashi (त्रयोदशी) dates and timings in Perth for 1991
Verified astronomical start and end times for lunar day 28 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 | 13 Jan 1991, 12:32 am GMT+8 | 14 Jan 1991, 3:10 am GMT+8 | 26 hr 38 min | Yes |
| 2 | 11 Feb 1991, 9:06 pm GMT+8 | 12 Feb 1991, 11:05 pm GMT+8 | 25 hr 59 min | Yes |
| 3 | 13 Mar 1991, 4:08 pm GMT+8 | 14 Mar 1991, 4:49 pm GMT+8 | 24 hr 40 min | Yes |
| 4 | 12 Apr 1991, 8:07 am GMT+8 | 13 Apr 1991, 7:15 am GMT+8 | 23 hr 8 min | Yes |
| 5 | 11 May 1991, 8:38 pm GMT+8 | 12 May 1991, 6:27 pm GMT+8 | 21 hr 50 min | Yes |
| 6 | 10 Jun 1991, 6:14 am GMT+8 | 11 Jun 1991, 3:12 am GMT+8 | 20 hr 58 min | Yes |
| 7 | 9 Jul 1991, 1:54 pm GMT+8 | 10 Jul 1991, 10:29 am GMT+8 | 20 hr 35 min | Yes |
| 8 | 7 Aug 1991, 8:36 pm GMT+8 | 8 Aug 1991, 5:16 pm GMT+8 | 20 hr 39 min | Yes |
| 9 | 6 Sept 1991, 3:17 am GMT+8 | 7 Sept 1991, 12:25 am GMT+8 | 21 hr 8 min | Yes |
| 10 | 5 Oct 1991, 10:51 am GMT+8 | 6 Oct 1991, 8:50 am GMT+8 | 21 hr 59 min | Yes |
| 11 | 3 Nov 1991, 8:19 pm GMT+8 | 4 Nov 1991, 7:31 pm GMT+8 | 23 hr 12 min | Yes |
| 12 | 3 Dec 1991, 9:38 am GMT+9 | 4 Dec 1991, 10:17 am GMT+9 | 24 hr 38 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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