Dwadashi (द्वादशी) dates and timings in Perth for 1981
Verified astronomical start and end times for lunar day 12 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 | 16 Jan 1981, 10:25 pm GMT+8 | 17 Jan 1981, 8:19 pm GMT+8 | 21 hr 53 min | Yes |
| 2 | 15 Feb 1981, 8:12 am GMT+8 | 16 Feb 1981, 7:18 am GMT+8 | 23 hr 6 min | Yes |
| 3 | 16 Mar 1981, 7:27 pm GMT+8 | 17 Mar 1981, 7:51 pm GMT+8 | 24 hr 24 min | Yes |
| 4 | 15 Apr 1981, 8:22 am GMT+8 | 16 Apr 1981, 9:51 am GMT+8 | 25 hr 29 min | Yes |
| 5 | 14 May 1981, 10:46 pm GMT+8 | 16 May 1981, 12:56 am GMT+8 | 26 hr 11 min | Yes |
| 6 | 13 Jun 1981, 2:17 pm GMT+8 | 14 Jun 1981, 4:41 pm GMT+8 | 26 hr 24 min | Yes |
| 7 | 13 Jul 1981, 6:31 am GMT+8 | 14 Jul 1981, 8:38 am GMT+8 | 26 hr 7 min | Yes |
| 8 | 11 Aug 1981, 10:58 pm GMT+8 | 13 Aug 1981, 12:17 am GMT+8 | 25 hr 19 min | Yes |
| 9 | 10 Sept 1981, 2:59 pm GMT+8 | 11 Sept 1981, 3:05 pm GMT+8 | 24 hr 6 min | Yes |
| 10 | 10 Oct 1981, 5:53 am GMT+8 | 11 Oct 1981, 4:37 am GMT+8 | 22 hr 44 min | Yes |
| 11 | 8 Nov 1981, 7:11 pm GMT+8 | 9 Nov 1981, 4:46 pm GMT+8 | 21 hr 35 min | Yes |
| 12 | 8 Dec 1981, 6:51 am GMT+8 | 9 Dec 1981, 3:46 am GMT+8 | 20 hr 55 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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