Ruling · Bahulā Caturthī · 2026

Monday 31 August

Determinatein Chicago, under the Rashtriya Panchang method. Clear of every threshold by 107 minutes.

Decide it for

41°51′ N 87°39′ W · America/Chicago · GeoNames 4887398

The two late afternoons

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

Late afternoon of Sunday 30 August

Caturthī is absent from sāyāhna. Not taken.

16:48 sāyāhna beginssunset 19:27
16:2416:4817:1217:3618:0018:2418:4819:1219:3620:00

0 of 158 minutes covered

Late afternoon of Monday 31 August

Taken. The only late afternoon Caturthī reaches.

16:47 sāyāhna beginssunset 19:25
16:2316:4717:1117:3517:5918:2318:4719:1119:3519:59

158 of 158 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 22:22 on Sun 30 Aug to 21:12 on Mon 31 Aug.

    2026-08-31T03:21:37Z → 2026-09-01T02:12:26Z

  2. 02

    Kāla

    Sāyāhna is last 3 of 15 day muhūrtas: 16:48–19:27 on the 30th, 16:47–19:25 on the 31st.

    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 158 minutes on the 30th and 158 of 158 on the 31st.

    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 6433 s

  5. 05

    Ruling

    Bahulā Caturthī, Chicago, 2026: Monday 31 August.

    confidence: determinate

Say it like this

In Chicago, Bahulā Caturthī 2026 falls on Monday 31 August. Caturthī runs from 22:22 on Sun 30 Aug to 21:12 on Mon 31 Aug and covers all of sāyāhna that late afternoon.

ahargana.org/chicago/festivals/2026/bahula-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 31 Aug
Ahargaṇa, classicalDisc centre, no refractionMon 31 Aug
compat-drikpanchangComparison profileMon 31 Aug
No institution has a recorded ruling for Chicago.

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 Angeles20:22 → 19:1216:45148 min16:440 min31 Aug
Chicago22:22 → 21:1216:47158 min16:460 min31 Aug
Jersey City23:22 → 22:1216:52157 min16:510 min31 Aug
Port of Spain23:22 → 22:1215:48148 min15:480 min31 Aug
London04:22 → 03:1217:05163 min17:040 min31 Aug
Durban05:22 → 04:1215:23138 min15:230 min31 Aug
Dubai07:22 → 06:1216:07152 min16:060 min31 Aug
Delhi08:52 → 07:4216:11153 min16:100 min31 Aug
Kolkata08:52 → 07:4215:23151 min15:230 min31 Aug
Singapore11:22 → 10:1216:43146 min16:430 min31 Aug
Sydney13:22 → 12:1215:20136 min15:200 min31 Aug
Suva15:22 → 14:1215:38141 min15:380 min31 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