Ruling · Bahulā Caturthī · 1921

Monday 22 August

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 499 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

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

The two late afternoons

One ghaṭī is 24 minutes. Sāyāhna is last 3 of 15 day muhūrtas.

Late afternoon of Monday 22 August

Taken. The only late afternoon Caturthī reaches.

15:53 sāyāhna beginssunset 18:39
15:2915:5316:1716:4117:0517:2917:5318:1718:4119:05

167 of 167 minutes covered

Late afternoon of Tuesday 23 August

Caturthī is absent from sāyāhna. Not taken.

15:51 sāyāhna beginssunset 18:37
15:2715:5116:1516:3917:0317:2717:5118:1518:3919:03

0 of 166 minutes covered

Caturthī presentSāyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 05:57 on Mon 22 Aug to 07:33 on Tue 23 Aug.

    1921-08-21T21:56:30Z → 1921-08-22T23:32:44Z

  2. 02

    Kāla

    Sāyāhna is last 3 of 15 day muhūrtas: 15:53–18:39 on the 22nd, 15:51–18:37 on the 23rd.

    sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Caturthī must be present during sāyāhna. It covers 167 of 167 minutes on the 22nd and 0 of 166 on the 23rd.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

  4. 04

    Tie-break

    Only one late afternoon qualifies. No tie-break is needed.

    priority: purvaviddha → only-day · margin 29916 s

  5. 05

    Ruling

    Bahulā Caturthī, Daqing, 1921: Monday 22 August.

    confidence: determinate

Say it like this

In Daqing, Bahulā Caturthī 1921 falls on Monday 22 August. Caturthī runs from 05:57 on Mon 22 Aug to 07:33 on Tue 23 Aug and covers all of sāyāhna that late afternoon.

ahargana.org/daqing/festivals/1921/bahula-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 22 Aug
Ahargaṇa, classicalDisc centre, no refractionMon 22 Aug
compat-drikpanchangComparison profileMon 22 Aug
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/bahula-chaturthi · ruleset 2026.3-draft

Month
Śrāvaṇa, amānta
Pakṣa · aṅga
Kṛṣṇa · Caturthī
Kāla
Sāyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 103

“K 4 Bahula caturthi (Madhyadesa) (Sayahnavyapini: if occurs on two successive days, it is to be observed on the 1st day).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturthīSāyāhna 21stCoveredSāyāhna 22ndCoveredRuled
Los Angeles13:57 → 15:3315:54159 min15:530 min21 Aug
Chicago16:57 → 18:3316:59163 min16:5895 min21 Aug
Jersey City17:57 → 19:3317:03109 min17:02151 min21 Aug
Port of Spain17:57 → 19:3315:5325 min15:52149 min21 Aug
London22:57 → 00:3317:200 min17:19171 min22 Aug
Durban23:57 → 01:3315:200 min15:20134 min22 Aug
Dubai01:57 → 03:3316:140 min16:13154 min22 Aug
Delhi03:27 → 05:0316:190 min16:18156 min22 Aug
Kolkata03:27 → 05:0315:300 min15:29153 min22 Aug
Singapore04:57 → 06:3315:460 min15:46146 min22 Aug
Sydney07:57 → 09:3315:170 min15:17132 min22 Aug
Suva09:57 → 11:3315:380 min15:38139 min22 Aug
Profile · tradition
pac-rp@2026.1 · smarta
Rule
bahula-chaturthi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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