Ruling · Bahulā Caturthī · 2090

Monday 14 August

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 165 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 13 August

Caturthī is absent from sāyāhna. Not taken.

16:30 sāyāhna beginssunset 19:15
16:0616:3016:5417:1817:4218:0618:3018:5419:1819:42

0 of 165 minutes covered

Late afternoon of Monday 14 August

Taken. The only late afternoon Caturthī reaches.

16:30 sāyāhna beginssunset 19:14
16:0616:3016:5417:1817:4218:0618:3018:5419:1819:42

164 of 164 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 22:01 on Sun 13 Aug to 00:37 on Tue 15 Aug.

    2090-08-13T14:00:49Z → 2090-08-14T16:36:53Z

  2. 02

    Kāla

    Sāyāhna is last 3 of 15 day muhūrtas: 16:30–19:15 on the 13th, 16:30–19:14 on the 14th.

    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 165 minutes on the 13th and 164 of 164 on the 14th.

    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 9925 s

  5. 05

    Ruling

    Bahulā Caturthī, Baoding, 2090: Monday 14 August.

    confidence: determinate

Say it like this

In Baoding, Bahulā Caturthī 2090 falls on Monday 14 August. Caturthī runs from 22:01 on Sun 13 Aug to 00:37 on Tue 15 Aug and covers all of sāyāhna that late afternoon.

ahargana.org/baoding/festivals/2090/bahula-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 14 Aug
Ahargaṇa, classicalDisc centre, no refractionMon 14 Aug
compat-drikpanchangComparison profileMon 14 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 13thCoveredSāyāhna 14thCoveredRuled
Los Angeles07:01 → 09:3717:00161 min16:590 min13 Aug
Chicago09:01 → 11:3717:06167 min17:050 min13 Aug
Jersey City10:01 → 12:3717:10166 min17:090 min13 Aug
Port of Spain10:01 → 12:3715:56150 min15:550 min13 Aug
London15:01 → 17:3717:30176 min17:289 min13 Aug
Durban16:01 → 18:3715:1990 min15:19132 min13 Aug
Dubai18:01 → 20:3716:1954 min16:18156 min13 Aug
Delhi19:31 → 22:0716:240 min16:23158 min14 Aug
Kolkata19:31 → 22:0715:340 min15:34155 min14 Aug
Singapore22:01 → 00:3716:490 min16:48146 min14 Aug
Sydney00:01 → 02:3715:150 min15:15130 min14 Aug
Suva02:01 → 04:3715:380 min15:38138 min14 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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