Ruling · Bahulā Caturthī · 2015

Tuesday 1 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 19 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 Tuesday 1 September

Taken. The only late afternoon Caturthī reaches.

16:13 sāyāhna beginssunset 18:49
Caturthī begins 15:54:05
15:4916:1316:3717:0117:2517:4918:1318:3719:01

157 of 157 minutes covered

Late afternoon of Wednesday 2 September

Caturthī is absent from sāyāhna. Not taken.

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

0 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 15:54 on Tue 1 Sep to 12:47 on Wed 2 Sep.

    2015-09-01T07:54:06Z → 2015-09-02T04:47:05Z

  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 157 of 157 minutes on the 1st and 0 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 1124 s

  5. 05

    Ruling

    Bahulā Caturthī, Baoding, 2015: Tuesday 1 September.

    confidence: determinate

Say it like this

In Baoding, Bahulā Caturthī 2015 falls on Tuesday 1 September. Caturthī runs from 15:54 on Tue 1 Sep to 12:47 on Wed 2 Sep and covers all of sāyāhna that late afternoon.

ahargana.org/baoding/festivals/2015/bahula-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 1 Sep
Ahargaṇa, classicalDisc centre, no refractionTue 1 Sep
compat-drikpanchangComparison profileTue 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 1stCoveredSāyāhna 2ndCoveredRuled
Los Angeles00:54 → 21:4716:44154 min16:430 min1 Sep
Chicago02:54 → 23:4716:47158 min16:450 min1 Sep
Jersey City03:54 → 00:4716:52157 min16:500 min1 Sep
Port of Spain03:54 → 00:4715:48148 min15:470 min1 Sep
London08:54 → 05:4717:04163 min17:030 min1 Sep
Durban09:54 → 06:4715:23138 min15:230 min1 Sep
Dubai11:54 → 08:4716:06152 min16:050 min1 Sep
Delhi13:24 → 10:1716:10153 min16:090 min1 Sep
Kolkata13:24 → 10:1715:23151 min15:220 min1 Sep
Singapore15:54 → 12:4716:43146 min16:430 min1 Sep
Sydney17:54 → 14:4715:200 min15:200 min1 Sep
Suva19:54 → 16:4715:380 min15:3869 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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