Tritiya (तृतीया) dates and timings in Perth for 1991
Verified astronomical start and end times for lunar day 18 in Perth, shown in Australia/Perth.
13 occurrences found. Each end time is exclusive: the next Tithi begins at that instant.
| # | Starts | Ends | Duration | Crosses midnight |
|---|---|---|---|---|
| 1 | 2 Jan 1991, 7:59 pm GMT+8 | 3 Jan 1991, 5:22 pm GMT+8 | 21 hr 23 min | Yes |
| 2 | 1 Feb 1991, 9:22 am GMT+8 | 2 Feb 1991, 7:47 am GMT+8 | 22 hr 25 min | Yes |
| 3 | 3 Mar 1991, 12:01 am GMT+8 | 3 Mar 1991, 11:43 pm GMT+8 | 23 hr 42 min | No |
| 4 | 1 Apr 1991, 3:37 pm GMT+8 | 2 Apr 1991, 4:39 pm GMT+8 | 25 hr 2 min | Yes |
| 5 | 1 May 1991, 7:52 am GMT+8 | 2 May 1991, 9:59 am GMT+8 | 26 hr 7 min | Yes |
| 6 | 31 May 1991, 12:16 am GMT+8 | 1 Jun 1991, 2:51 am GMT+8 | 26 hr 35 min | Yes |
| 7 | 29 Jun 1991, 4:01 pm GMT+8 | 30 Jun 1991, 6:18 pm GMT+8 | 26 hr 17 min | Yes |
| 8 | 29 Jul 1991, 6:16 am GMT+8 | 30 Jul 1991, 7:37 am GMT+8 | 25 hr 21 min | Yes |
| 9 | 27 Aug 1991, 6:39 pm GMT+8 | 28 Aug 1991, 6:45 pm GMT+8 | 24 hr 5 min | Yes |
| 10 | 26 Sept 1991, 5:26 am GMT+8 | 27 Sept 1991, 4:16 am GMT+8 | 22 hr 50 min | Yes |
| 11 | 25 Oct 1991, 3:20 pm GMT+8 | 26 Oct 1991, 1:06 pm GMT+8 | 21 hr 46 min | Yes |
| 12 | 24 Nov 1991, 2:07 am GMT+9 | 24 Nov 1991, 11:07 pm GMT+9 | 21 hr 0 min | No |
| 13 | 23 Dec 1991, 12:18 pm GMT+9 | 24 Dec 1991, 8:54 am GMT+9 | 20 hr 36 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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