Trayodashi (त्रयोदशी) dates and timings in Perth for 1975
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 | 25 Jan 1975, 9:40 am GMT+9 | 26 Jan 1975, 6:59 am GMT+9 | 21 hr 19 min | Yes |
| 2 | 23 Feb 1975, 9:24 pm GMT+9 | 24 Feb 1975, 5:59 pm GMT+9 | 20 hr 34 min | Yes |
| 3 | 25 Mar 1975, 5:32 am GMT+8 | 26 Mar 1975, 1:57 am GMT+8 | 20 hr 25 min | Yes |
| 4 | 23 Apr 1975, 12:53 pm GMT+8 | 24 Apr 1975, 9:45 am GMT+8 | 20 hr 52 min | Yes |
| 5 | 22 May 1975, 7:35 pm GMT+8 | 23 May 1975, 5:22 pm GMT+8 | 21 hr 46 min | Yes |
| 6 | 21 Jun 1975, 2:51 am GMT+8 | 22 Jun 1975, 1:48 am GMT+8 | 22 hr 58 min | Yes |
| 7 | 20 Jul 1975, 11:40 am GMT+8 | 21 Jul 1975, 11:53 am GMT+8 | 24 hr 13 min | Yes |
| 8 | 18 Aug 1975, 10:50 pm GMT+8 | 20 Aug 1975, 12:11 am GMT+8 | 25 hr 20 min | Yes |
| 9 | 17 Sept 1975, 12:52 pm GMT+8 | 18 Sept 1975, 3:02 pm GMT+8 | 26 hr 10 min | Yes |
| 10 | 17 Oct 1975, 5:49 am GMT+8 | 18 Oct 1975, 8:20 am GMT+8 | 26 hr 31 min | Yes |
| 11 | 16 Nov 1975, 1:02 am GMT+8 | 17 Nov 1975, 3:14 am GMT+8 | 26 hr 12 min | Yes |
| 12 | 15 Dec 1975, 9:02 pm GMT+8 | 16 Dec 1975, 10:11 pm GMT+8 | 25 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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