Tritiya (तृतीया) dates and timings in Perth for 1975
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 | 31 Dec 1974, 6:36 am GMT+9 | 1 Jan 1975, 3:21 am GMT+9 | 20 hr 45 min | Yes |
| 2 | 29 Jan 1975, 4:35 pm GMT+9 | 30 Jan 1975, 1:00 pm GMT+9 | 20 hr 25 min | Yes |
| 3 | 28 Feb 1975, 2:36 am GMT+9 | 28 Feb 1975, 11:19 pm GMT+9 | 20 hr 43 min | No |
| 4 | 29 Mar 1975, 12:10 pm GMT+8 | 30 Mar 1975, 9:45 am GMT+8 | 21 hr 35 min | Yes |
| 5 | 27 Apr 1975, 11:38 pm GMT+8 | 28 Apr 1975, 10:25 pm GMT+8 | 22 hr 46 min | Yes |
| 6 | 27 May 1975, 12:10 pm GMT+8 | 28 May 1975, 12:14 pm GMT+8 | 24 hr 3 min | Yes |
| 7 | 26 Jun 1975, 1:50 am GMT+8 | 27 Jun 1975, 3:02 am GMT+8 | 25 hr 13 min | Yes |
| 8 | 25 Jul 1975, 4:35 pm GMT+8 | 26 Jul 1975, 6:40 pm GMT+8 | 26 hr 5 min | Yes |
| 9 | 24 Aug 1975, 8:22 am GMT+8 | 25 Aug 1975, 10:51 am GMT+8 | 26 hr 29 min | Yes |
| 10 | 23 Sept 1975, 12:44 am GMT+8 | 24 Sept 1975, 3:00 am GMT+8 | 26 hr 16 min | Yes |
| 11 | 22 Oct 1975, 4:54 pm GMT+8 | 23 Oct 1975, 6:16 pm GMT+8 | 25 hr 22 min | Yes |
| 12 | 21 Nov 1975, 7:51 am GMT+8 | 22 Nov 1975, 7:51 am GMT+8 | 24 hr 0 min | Yes |
| 13 | 20 Dec 1975, 8:57 pm GMT+8 | 21 Dec 1975, 7:30 pm GMT+8 | 22 hr 33 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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