Dwadashi (द्वादशी) dates and timings in Perth for 1991
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 | 27 Jan 1991, 2:18 am GMT+8 | 27 Jan 1991, 11:18 pm GMT+8 | 21 hr 0 min | No |
| 2 | 25 Feb 1991, 11:07 am GMT+8 | 26 Feb 1991, 8:44 am GMT+8 | 21 hr 37 min | Yes |
| 3 | 26 Mar 1991, 7:36 pm GMT+8 | 27 Mar 1991, 6:06 pm GMT+8 | 22 hr 30 min | Yes |
| 4 | 25 Apr 1991, 4:24 am GMT+8 | 26 Apr 1991, 3:58 am GMT+8 | 23 hr 33 min | Yes |
| 5 | 24 May 1991, 2:22 pm GMT+8 | 25 May 1991, 3:04 pm GMT+8 | 24 hr 41 min | Yes |
| 6 | 23 Jun 1991, 2:15 am GMT+8 | 24 Jun 1991, 3:59 am GMT+8 | 25 hr 45 min | Yes |
| 7 | 22 Jul 1991, 4:29 pm GMT+8 | 23 Jul 1991, 6:56 pm GMT+8 | 26 hr 27 min | Yes |
| 8 | 21 Aug 1991, 8:54 am GMT+8 | 22 Aug 1991, 11:26 am GMT+8 | 26 hr 32 min | Yes |
| 9 | 20 Sept 1991, 2:41 am GMT+8 | 21 Sept 1991, 4:32 am GMT+8 | 25 hr 51 min | Yes |
| 10 | 19 Oct 1991, 8:37 pm GMT+8 | 20 Oct 1991, 9:16 pm GMT+8 | 24 hr 38 min | Yes |
| 11 | 18 Nov 1991, 2:41 pm GMT+9 | 19 Nov 1991, 1:57 pm GMT+9 | 23 hr 17 min | Yes |
| 12 | 18 Dec 1991, 6:10 am GMT+9 | 19 Dec 1991, 4:17 am GMT+9 | 22 hr 7 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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