Dwitiya (द्वितीया) dates and timings in Perth for 1981
Verified astronomical start and end times for lunar day 17 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 | 21 Jan 1981, 2:58 pm GMT+8 | 22 Jan 1981, 2:53 pm GMT+8 | 23 hr 55 min | Yes |
| 2 | 20 Feb 1981, 7:44 am GMT+8 | 21 Feb 1981, 8:59 am GMT+8 | 25 hr 15 min | Yes |
| 3 | 22 Mar 1981, 1:13 am GMT+8 | 23 Mar 1981, 3:21 am GMT+8 | 26 hr 8 min | Yes |
| 4 | 20 Apr 1981, 6:21 pm GMT+8 | 21 Apr 1981, 8:46 pm GMT+8 | 26 hr 26 min | Yes |
| 5 | 20 May 1981, 10:20 am GMT+8 | 21 May 1981, 12:27 pm GMT+8 | 26 hr 7 min | Yes |
| 6 | 19 Jun 1981, 12:39 am GMT+8 | 20 Jun 1981, 1:53 am GMT+8 | 25 hr 14 min | Yes |
| 7 | 18 Jul 1981, 1:03 pm GMT+8 | 19 Jul 1981, 1:00 pm GMT+8 | 23 hr 57 min | Yes |
| 8 | 16 Aug 1981, 11:35 pm GMT+8 | 17 Aug 1981, 10:07 pm GMT+8 | 22 hr 32 min | Yes |
| 9 | 15 Sept 1981, 8:45 am GMT+8 | 16 Sept 1981, 6:03 am GMT+8 | 21 hr 18 min | Yes |
| 10 | 14 Oct 1981, 5:25 pm GMT+8 | 15 Oct 1981, 1:55 pm GMT+8 | 20 hr 30 min | Yes |
| 11 | 13 Nov 1981, 2:35 am GMT+8 | 13 Nov 1981, 10:50 pm GMT+8 | 20 hr 15 min | No |
| 12 | 12 Dec 1981, 12:58 pm GMT+8 | 13 Dec 1981, 9:33 am GMT+8 | 20 hr 34 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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