Tritiya (तृतीया) dates and timings in Perth for 1990
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 | 13 Jan 1990, 10:32 am GMT+8 | 14 Jan 1990, 10:18 am GMT+8 | 23 hr 46 min | Yes |
| 2 | 12 Feb 1990, 3:49 am GMT+8 | 13 Feb 1990, 4:56 am GMT+8 | 25 hr 7 min | Yes |
| 3 | 13 Mar 1990, 9:58 pm GMT+8 | 15 Mar 1990, 12:02 am GMT+8 | 26 hr 3 min | Yes |
| 4 | 12 Apr 1990, 3:46 pm GMT+8 | 13 Apr 1990, 6:13 pm GMT+8 | 26 hr 27 min | Yes |
| 5 | 12 May 1990, 8:16 am GMT+8 | 13 May 1990, 10:31 am GMT+8 | 26 hr 14 min | Yes |
| 6 | 10 Jun 1990, 10:51 pm GMT+8 | 12 Jun 1990, 12:19 am GMT+8 | 25 hr 28 min | Yes |
| 7 | 10 Jul 1990, 11:13 am GMT+8 | 11 Jul 1990, 11:29 am GMT+8 | 24 hr 16 min | Yes |
| 8 | 8 Aug 1990, 9:26 pm GMT+8 | 9 Aug 1990, 8:20 pm GMT+8 | 22 hr 54 min | Yes |
| 9 | 7 Sept 1990, 6:03 am GMT+8 | 8 Sept 1990, 3:43 am GMT+8 | 21 hr 41 min | Yes |
| 10 | 6 Oct 1990, 2:00 pm GMT+8 | 7 Oct 1990, 10:50 am GMT+8 | 20 hr 50 min | Yes |
| 11 | 4 Nov 1990, 10:27 pm GMT+8 | 5 Nov 1990, 6:57 pm GMT+8 | 20 hr 30 min | Yes |
| 12 | 4 Dec 1990, 8:18 am GMT+8 | 5 Dec 1990, 5:01 am GMT+8 | 20 hr 43 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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