Ruling · Bahulā Caturthī · 2073

Monday 21 August

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 422 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 Monday 21 August

Taken. The only late afternoon Caturthī reaches.

16:23 sāyāhna beginssunset 19:04
15:5916:2316:4717:1117:3517:5918:2318:4719:1119:35

161 of 161 minutes covered

Late afternoon of Tuesday 22 August

Caturthī is absent from sāyāhna. Not taken.

16:22 sāyāhna beginssunset 19:03
15:5816:2216:4617:1017:3417:5818:2218:4619:1019:34

0 of 161 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 06:59 on Mon 21 Aug to 09:20 on Tue 22 Aug.

    2073-08-20T22:59:20Z → 2073-08-22T01:20:26Z

  2. 02

    Kāla

    Sāyāhna is last 3 of 15 day muhūrtas: 16:23–19:04 on the 21st, 16:22–19:03 on the 22nd.

    sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Caturthī must be present during sāyāhna. It covers 161 of 161 minutes on the 21st and 0 of 161 on the 22nd.

    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 25302 s

  5. 05

    Ruling

    Bahulā Caturthī, Baoding, 2073: Monday 21 August.

    confidence: determinate

Say it like this

In Baoding, Bahulā Caturthī 2073 falls on Monday 21 August. Caturthī runs from 06:59 on Mon 21 Aug to 09:20 on Tue 22 Aug and covers all of sāyāhna that late afternoon.

ahargana.org/baoding/festivals/2073/bahula-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 21 Aug
Ahargaṇa, classicalDisc centre, no refractionMon 21 Aug
compat-drikpanchangComparison profileMon 21 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 20thCoveredSāyāhna 22ndCoveredRuled
Los Angeles15:59 → 18:2016:54159 min16:530 min20 Aug
Chicago17:59 → 20:2016:59103 min16:570 min20 Aug
Jersey City18:59 → 21:2017:0347 min17:010 min20 Aug
Port of Spain18:59 → 21:2015:530 min15:520 min21 Aug
London23:59 → 02:2017:200 min17:180 min21 Aug
Durban00:59 → 03:2015:210 min15:210 min21 Aug
Dubai02:59 → 05:2016:140 min16:130 min21 Aug
Delhi04:29 → 06:5016:190 min16:170 min21 Aug
Kolkata04:29 → 06:5015:300 min15:290 min21 Aug
Singapore06:59 → 09:2016:470 min16:460 min21 Aug
Sydney08:59 → 11:2015:170 min15:180 min21 Aug
Suva10:59 → 13:2015:380 min15:380 min21 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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