Ruling · Bahulā Caturthī · 1931

Monday 31 August

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 20 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 31 August

Taken. Both late afternoons qualify; the rule takes the first.

16:14 sāyāhna beginssunset 18:52
Caturthī begins 18:31:43
15:5016:1416:3817:0217:2617:5018:1418:3819:02

20 of 157 minutes covered, the last 20

Late afternoon of Tuesday 1 September

Qualifies with 157 of 157 minutes. Not taken.

16:13 sāyāhna beginssunset 18:50
15:4916:1316:3717:0117:2517:4918:1318:3719:01

157 of 157 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 18:32 on Mon 31 Aug to 21:08 on Tue 1 Sep.

    1931-08-31T10:31:43Z → 1931-09-01T13:07:47Z

  2. 02

    Kāla

    Sāyāhna is last 3 of 15 day muhūrtas: 16:14–18:52 on the 31st, 16:13–18:50 on the 1st.

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

  3. 03

    Rule

    Caturthī must be present during sāyāhna. It covers 20 of 157 minutes on the 31st and 157 of 157 on the 1st.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

  4. 04

    Tie-break

    Both late afternoons qualify. Pūrvaviddhā: the first is taken.

    priority: purvaviddha → purvaviddha · margin 1208 s

  5. 05

    Ruling

    Bahulā Caturthī, Baoding, 1931: Monday 31 August.

    confidence: determinate

Say it like this

In Baoding, Bahulā Caturthī 1931 falls on Monday 31 August. Caturthī runs from 18:32 on Mon 31 Aug to 21:08 on Tue 1 Sep and covers 20 of 157 minutes of sāyāhna that late afternoon. It also reaches the next late afternoon for 157 minutes; by the rule the first late afternoon is taken.

ahargana.org/baoding/festivals/1931/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 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 31stCoveredSāyāhna 1stCoveredRuled
Los Angeles02:32 → 05:0815:46155 min15:450 min31 Aug
Chicago05:32 → 08:0816:48158 min16:470 min31 Aug
Jersey City06:32 → 09:0816:53158 min16:520 min31 Aug
Port of Spain06:32 → 09:0815:48148 min15:480 min31 Aug
London11:32 → 14:0817:07164 min17:050 min31 Aug
Durban12:32 → 15:0815:22137 min15:230 min31 Aug
Dubai14:32 → 17:0816:07152 min16:0761 min31 Aug
Delhi16:02 → 18:3816:11153 min16:11147 min31 Aug
Kolkata16:02 → 18:3815:24114 min15:23151 min31 Aug
Singapore17:32 → 20:0815:4437 min15:43146 min31 Aug
Sydney20:32 → 23:0815:200 min15:20136 min1 Sep
Suva22:32 → 01:0815:380 min15:38141 min1 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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