Ruling · Bahulā Caturthī · 2021

Thursday 26 August

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 17 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 Wednesday 25 August

Caturthī is absent from sāyāhna. Not taken.

15:48 sāyāhna beginssunset 18:32
Caturthī begins 18:49:01
15:2415:4816:1216:3617:0017:2417:4818:1218:3619:00

0 of 164 minutes covered

Late afternoon of Thursday 26 August

Taken. The only late afternoon Caturthī reaches.

15:47 sāyāhna beginssunset 18:31
15:2315:4716:1116:3516:5917:2317:4718:1118:3518:59

164 of 164 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 18:49 on Wed 25 Aug to 19:44 on Thu 26 Aug.

    2021-08-25T10:49:01Z → 2021-08-26T11:44:23Z

  2. 02

    Kāla

    Sāyāhna is last 3 of 15 day muhūrtas: 15:48–18:32 on the 25th, 15:47–18:31 on the 26th.

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

  3. 03

    Rule

    Caturthī must be present during sāyāhna. It covers 0 of 164 minutes on the 25th and 164 of 164 on the 26th.

    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 997 s

  5. 05

    Ruling

    Bahulā Caturthī, Daqing, 2021: Thursday 26 August.

    confidence: determinate

Say it like this

In Daqing, Bahulā Caturthī 2021 falls on Thursday 26 August. Caturthī runs from 18:49 on Wed 25 Aug to 19:44 on Thu 26 Aug and covers all of sāyāhna that late afternoon.

ahargana.org/daqing/festivals/2021/bahula-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 26 Aug
Ahargaṇa, classicalDisc centre, no refractionThu 26 Aug
compat-drikpanchangComparison profileThu 26 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 25thCoveredSāyāhna 26thCoveredRuled
Los Angeles03:49 → 04:4416:50157 min16:490 min25 Aug
Chicago05:49 → 06:4416:54161 min16:530 min25 Aug
Jersey City06:49 → 07:4416:58160 min16:570 min25 Aug
Port of Spain06:49 → 07:4415:51148 min15:500 min25 Aug
London11:49 → 12:4417:14168 min17:120 min25 Aug
Durban12:49 → 13:4415:21136 min15:220 min25 Aug
Dubai14:49 → 15:4416:11153 min16:100 min25 Aug
Delhi16:19 → 17:1416:15151 min16:1460 min25 Aug
Kolkata16:19 → 17:1415:27101 min15:27108 min25 Aug
Singapore18:49 → 19:4416:4522 min16:45146 min25 Aug
Sydney20:49 → 21:4415:180 min15:19134 min26 Aug
Suva22:49 → 23:4415:380 min15:38140 min26 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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