Ruling · Bahulā Caturthī · 1977

Thursday 1 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 468 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 31 August

Caturthī is absent from sāyāhna. Not taken.

16:14 sāyāhna beginssunset 18:51
15:5016:1416:3817:0217:2617:5018:1418:3819:02

0 of 157 minutes covered

Late afternoon of Thursday 1 September

Taken. The only late afternoon Caturthī reaches.

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

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 02:39 on Thu 1 Sep to 03:30 on Fri 2 Sep.

    1977-08-31T18:39:03Z → 1977-09-01T19:29:43Z

  2. 02

    Kāla

    Sāyāhna is last 3 of 15 day muhūrtas: 16:14–18:51 on the 31st, 16:13–18:49 on the 1st.

    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 31st and 156 of 156 on the 1st.

    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 28109 s

  5. 05

    Ruling

    Bahulā Caturthī, Baoding, 1977: Thursday 1 September.

    confidence: determinate

Say it like this

In Baoding, Bahulā Caturthī 1977 falls on Thursday 1 September. Caturthī runs from 02:39 on Thu 1 Sep to 03:30 on Fri 2 Sep and covers all of sāyāhna that late afternoon.

ahargana.org/baoding/festivals/1977/bahula-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 1 Sep
Ahargaṇa, classicalDisc centre, no refractionThu 1 Sep
compat-drikpanchangComparison profileThu 1 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 31stCoveredSāyāhna 1stCoveredRuled
Los Angeles11:39 → 12:3016:45155 min16:440 min31 Aug
Chicago13:39 → 14:3016:47158 min16:460 min31 Aug
Jersey City14:39 → 15:3016:52157 min16:510 min31 Aug
Port of Spain14:39 → 15:3015:48148 min15:480 min31 Aug
London19:39 → 20:3017:0610 min17:04163 min31 Aug
Durban20:39 → 21:3015:230 min15:23138 min1 Sep
Dubai22:39 → 23:3016:070 min16:06152 min1 Sep
Delhi00:09 → 01:0016:110 min16:10153 min1 Sep
Kolkata00:09 → 01:0015:230 min15:23151 min1 Sep
Singapore02:09 → 03:0016:130 min16:13146 min1 Sep
Sydney04:39 → 05:3015:200 min15:20136 min1 Sep
Suva06:39 → 07:3015:380 min15:38141 min1 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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