Ruling · Bahulā Caturthī · 1920

Thursday 2 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 85 minutes.

Decide it for

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two late afternoons

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

Late afternoon of Wednesday 1 September

Caturthī is absent from sāyāhna. Not taken.

16:13 sāyāhna beginssunset 18:49
15:4916:1316:3717:0117:2517:4918:1318:3719:01

0 of 157 minutes covered

Late afternoon of Thursday 2 September

Taken. The only late afternoon Caturthī reaches.

16:12 sāyāhna beginssunset 18:48
15:4816:1216:3617:0017:2417:4818:1218:3619:00

156 of 156 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 20:58 on Wed 1 Sep to 20:13 on Thu 2 Sep.

    1920-09-01T12:57:42Z → 1920-09-02T12:12:55Z

  2. 02

    Kāla

    Sāyāhna is last 3 of 15 day muhūrtas: 16:13–18:49 on the 1st, 16:12–18:48 on the 2nd.

    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 157 minutes on the 1st and 156 of 156 on the 2nd.

    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 5108 s

  5. 05

    Ruling

    Bahulā Caturthī, Baoding, 1920: Thursday 2 September.

    confidence: determinate

Say it like this

In Baoding, Bahulā Caturthī 1920 falls on Thursday 2 September. Caturthī runs from 20:58 on Wed 1 Sep to 20:13 on Thu 2 Sep and covers all of sāyāhna that late afternoon.

ahargana.org/baoding/festivals/1920/bahula-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 2 Sep
Ahargaṇa, classicalDisc centre, no refractionThu 2 Sep
compat-drikpanchangComparison profileThu 2 Sep
No institution has a recorded ruling for Baoding.

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 1stCoveredSāyāhna 2ndCoveredRuled
Los Angeles04:58 → 04:1315:44154 min15:430 min1 Sep
Chicago07:58 → 07:1316:46158 min16:450 min1 Sep
Jersey City08:58 → 08:1316:51157 min16:500 min1 Sep
Port of Spain08:58 → 08:1315:48148 min15:470 min1 Sep
London13:58 → 13:1317:04163 min17:030 min1 Sep
Durban14:58 → 14:1315:23138 min15:230 min1 Sep
Dubai16:58 → 16:1316:06100 min16:058 min1 Sep
Delhi18:28 → 17:4316:1015 min16:0994 min1 Sep
Kolkata18:28 → 17:4315:230 min15:22141 min2 Sep
Singapore19:58 → 19:1315:430 min15:43146 min2 Sep
Sydney22:58 → 22:1315:200 min15:20137 min2 Sep
Suva00:58 → 00:1315:380 min15:38141 min2 Sep
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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