Ruling · Bahulā Caturthī · 2009

Sunday 9 August

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 61 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 Sunday 9 August

Taken. The only late afternoon Caturthī reaches.

16:34 sāyāhna beginssunset 19:20
16:1016:3416:5817:2217:4618:1018:3418:5819:2219:46

167 of 167 minutes covered

Late afternoon of Monday 10 August

Caturthī is absent from sāyāhna. Not taken.

16:33 sāyāhna beginssunset 19:19
16:0916:3316:5717:2117:4518:0918:3318:5719:2119:45

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 14:30 on Sun 9 Aug to 15:32 on Mon 10 Aug.

    2009-08-09T06:29:38Z → 2009-08-10T07:31:58Z

  2. 02

    Kāla

    Sāyāhna is last 3 of 15 day muhūrtas: 16:34–19:20 on the 9th, 16:33–19:19 on the 10th.

    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 9th and 0 of 166 on the 10th.

    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 3652 s

  5. 05

    Ruling

    Bahulā Caturthī, Baoding, 2009: Sunday 9 August.

    confidence: determinate

Say it like this

In Baoding, Bahulā Caturthī 2009 falls on Sunday 9 August. Caturthī runs from 14:30 on Sun 9 Aug to 15:32 on Mon 10 Aug and covers all of sāyāhna that late afternoon.

ahargana.org/baoding/festivals/2009/bahula-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 9 Aug
Ahargaṇa, classicalDisc centre, no refractionSun 9 Aug
compat-drikpanchangComparison profileSun 9 Aug
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 9thCoveredSāyāhna 10thCoveredRuled
Los Angeles23:30 → 00:3217:03163 min17:020 min9 Aug
Chicago01:30 → 02:3217:09169 min17:080 min9 Aug
Jersey City02:30 → 03:3217:14168 min17:130 min9 Aug
Port of Spain02:30 → 03:3215:57150 min15:560 min9 Aug
London07:30 → 08:3217:35179 min17:330 min9 Aug
Durban08:30 → 09:3215:17131 min15:180 min9 Aug
Dubai10:30 → 11:3216:20158 min16:200 min9 Aug
Delhi12:00 → 13:0216:26160 min16:250 min9 Aug
Kolkata12:00 → 13:0215:36156 min15:360 min9 Aug
Singapore14:30 → 15:3216:49146 min16:490 min9 Aug
Sydney16:30 → 17:3215:1351 min15:13128 min9 Aug
Suva18:30 → 19:3215:370 min15:37137 min10 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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