Dwitiya (द्वितीया) dates and timings in Adelaide for 1981
Verified astronomical start and end times for lunar day 17 in Adelaide, shown in Australia/Adelaide.
12 occurrences found. Each end time is exclusive: the next Tithi begins at that instant.
| # | Starts | Ends | Duration | Crosses midnight |
|---|---|---|---|---|
| 1 | 21 Jan 1981, 5:28 pm GMT+10:30 | 22 Jan 1981, 5:23 pm GMT+10:30 | 23 hr 55 min | Yes |
| 2 | 20 Feb 1981, 10:14 am GMT+10:30 | 21 Feb 1981, 11:29 am GMT+10:30 | 25 hr 15 min | Yes |
| 3 | 22 Mar 1981, 2:43 am GMT+9:30 | 23 Mar 1981, 4:51 am GMT+9:30 | 26 hr 8 min | Yes |
| 4 | 20 Apr 1981, 7:51 pm GMT+9:30 | 21 Apr 1981, 10:16 pm GMT+9:30 | 26 hr 26 min | Yes |
| 5 | 20 May 1981, 11:50 am GMT+9:30 | 21 May 1981, 1:57 pm GMT+9:30 | 26 hr 7 min | Yes |
| 6 | 19 Jun 1981, 2:09 am GMT+9:30 | 20 Jun 1981, 3:23 am GMT+9:30 | 25 hr 14 min | Yes |
| 7 | 18 Jul 1981, 2:33 pm GMT+9:30 | 19 Jul 1981, 2:30 pm GMT+9:30 | 23 hr 57 min | Yes |
| 8 | 17 Aug 1981, 1:05 am GMT+9:30 | 17 Aug 1981, 11:37 pm GMT+9:30 | 22 hr 32 min | No |
| 9 | 15 Sept 1981, 10:15 am GMT+9:30 | 16 Sept 1981, 7:33 am GMT+9:30 | 21 hr 18 min | Yes |
| 10 | 14 Oct 1981, 6:55 pm GMT+9:30 | 15 Oct 1981, 3:25 pm GMT+9:30 | 20 hr 30 min | Yes |
| 11 | 13 Nov 1981, 5:05 am GMT+10:30 | 14 Nov 1981, 1:20 am GMT+10:30 | 20 hr 15 min | Yes |
| 12 | 12 Dec 1981, 3:28 pm GMT+10:30 | 13 Dec 1981, 12:03 pm GMT+10:30 | 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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