Tritiya (तृतीया) dates and timings in Perth for 1981
Verified astronomical start and end times for lunar day 18 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 | 22 Jan 1981, 2:53 pm GMT+8 | 23 Jan 1981, 3:26 pm GMT+8 | 24 hr 33 min | Yes |
| 2 | 21 Feb 1981, 8:59 am GMT+8 | 22 Feb 1981, 10:42 am GMT+8 | 25 hr 42 min | Yes |
| 3 | 23 Mar 1981, 3:21 am GMT+8 | 24 Mar 1981, 5:42 am GMT+8 | 26 hr 21 min | Yes |
| 4 | 21 Apr 1981, 8:46 pm GMT+8 | 22 Apr 1981, 11:11 pm GMT+8 | 26 hr 25 min | Yes |
| 5 | 21 May 1981, 12:27 pm GMT+8 | 22 May 1981, 2:19 pm GMT+8 | 25 hr 52 min | Yes |
| 6 | 20 Jun 1981, 1:53 am GMT+8 | 21 Jun 1981, 2:43 am GMT+8 | 24 hr 50 min | Yes |
| 7 | 19 Jul 1981, 1:00 pm GMT+8 | 20 Jul 1981, 12:30 pm GMT+8 | 23 hr 30 min | Yes |
| 8 | 17 Aug 1981, 10:07 pm GMT+8 | 18 Aug 1981, 8:18 pm GMT+8 | 22 hr 11 min | Yes |
| 9 | 16 Sept 1981, 6:03 am GMT+8 | 17 Sept 1981, 3:11 am GMT+8 | 21 hr 9 min | Yes |
| 10 | 15 Oct 1981, 1:55 pm GMT+8 | 16 Oct 1981, 10:29 am GMT+8 | 20 hr 34 min | Yes |
| 11 | 13 Nov 1981, 10:50 pm GMT+8 | 14 Nov 1981, 7:23 pm GMT+8 | 20 hr 33 min | Yes |
| 12 | 13 Dec 1981, 9:33 am GMT+8 | 14 Dec 1981, 6:34 am GMT+8 | 21 hr 2 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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