Ruling · Gaurī Tṛtīyā (Gangaur) · 2021

Thursday 15 April

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 193 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Wednesday 14 April

Tṛtīyā is absent from madhyāhna. Not taken.

madhyāhna begins 11:17  12:05 madhyāhna ends
10:2910:5311:1711:4112:0512:2912:53

0 of 48 minutes covered

Midday of Thursday 15 April

Taken. The only midday Tṛtīyā reaches.

madhyāhna begins 11:17  12:05 madhyāhna ends
10:2910:5311:1711:4112:0512:2912:53

48 of 48 minutes covered

Tṛtīyā presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Tṛtīyā runs from 15:18 on Wed 14 Apr to 17:58 on Thu 15 Apr.

    2021-04-14T07:18:08Z → 2021-04-15T09:57:31Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:17–12:05 on the 14th, 11:17–12:05 on the 15th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Tṛtīyā must be present during madhyāhna. It covers 0 of 48 minutes on the 14th and 48 of 48 on the 15th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 11602 s

  5. 05

    Ruling

    Gaurī Tṛtīyā, Daqing, 2021: Thursday 15 April.

    confidence: determinate

Say it like this

In Daqing, Gaurī Tṛtīyā (Gangaur) 2021 falls on Thursday 15 April. Tṛtīyā runs from 15:18 on Wed 14 Apr to 17:58 on Thu 15 Apr and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2021/gauri-tritiya · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 15 Apr
Ahargaṇa, classicalDisc centre, no refractionThu 15 Apr
compat-drikpanchangComparison profileThu 15 Apr
No institution has a recorded ruling for Daqing.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/gauri-tritiya · ruleset 2026.3-draft

Month
Caitra, amānta
Pakṣa · aṅga
Śukla · Tṛtīyā
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 102

“S 3 Dolotsava, Gauri trtiya, Andolana trtiya, Saubhagya sayana vrata (paraviddha), Sarhul (Bihar).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceTṛtīyāMadhyāhna 14thCoveredMadhyāhna 15thCoveredRuled
Los Angeles00:18 → 02:5812:2948 min12:290 min14 Apr
Chicago02:18 → 04:5812:2748 min12:270 min14 Apr
Jersey City03:18 → 05:5812:3348 min12:330 min14 Apr
Port of Spain03:18 → 05:5811:4248 min11:420 min14 Apr
London08:18 → 10:5812:3748 min12:370 min14 Apr
Durban09:18 → 11:5811:3248 min11:3226 min14 Apr
Dubai11:18 → 13:5811:5548 min11:5548 min14 Apr
Delhi12:48 → 15:2811:580 min11:5748 min15 Apr
Kolkata12:48 → 15:2811:130 min11:1348 min15 Apr
Singapore15:18 → 17:5812:410 min12:4148 min15 Apr
Sydney17:18 → 19:5811:310 min11:3148 min15 Apr
Suva19:18 → 21:5811:430 min11:4248 min15 Apr
Profile · tradition
pac-rp@2026.1 · smarta
Rule
gauri-tritiya@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa