Ruling · Gaṇeśa Caturthī · 2011

Thursday 1 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 530 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Wednesday 31 August

Caturthī is absent from madhyāhna. Not taken.

madhyāhna begins 11:54  12:42 madhyāhna ends
11:0611:3011:5412:1812:4213:0613:30

0 of 48 minutes covered

Midday of Thursday 1 September

Taken. The only midday Caturthī reaches.

madhyāhna begins 11:54  12:42 madhyāhna ends
11:0611:3011:5412:1812:4213:0613:30

48 of 48 minutes covered

Caturthī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 00:46 on Thu 1 Sep to 21:32 on Thu 1 Sep.

    2011-08-31T16:45:52Z → 2011-09-01T13:32:28Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 31st, 11:54–12:42 on the 1st.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Caturthī must be present during madhyāhna. It covers 0 of 48 minutes on the 31st and 48 of 48 on the 1st.

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

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: purvaviddha → only-day · margin 31826 s

  5. 05

    Ruling

    Gaṇeśa Caturthī, Baoding, 2011: Thursday 1 September.

    confidence: determinate

Say it like this

In Baoding, Gaṇeśa Caturthī 2011 falls on Thursday 1 September. Caturthī runs from 00:46 on Thu 1 Sep to 21:32 on Thu 1 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2011/ganesha-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 1 Sep
Ahargaṇa, classicalDisc centre, no refractionThu 1 Sep
compat-drikpanchangComparison profileThu 1 Sep
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/ganesha-chaturthi · ruleset 2026.3-draft

Month
Bhādrapada, amānta
Pakṣa · aṅga
Śukla · Caturthī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 103

“S 4 Varada caturthi (purvaviddha, madhyahnavyapini), Samvatsari parva (Jain-caturthi paksa), Saubhagya caturthi (Bengal), Ganesa caturthi (madhyahna vyapini and purvaviddha)” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturthīMadhyāhna 31stCoveredMadhyāhna 1stCoveredRuled
Los Angeles09:46 → 06:3212:2948 min12:290 min31 Aug
Chicago11:46 → 08:3212:2748 min12:260 min31 Aug
Jersey City12:46 → 09:3212:3234 min12:320 min31 Aug
Port of Spain12:46 → 09:3211:420 min11:420 min1 Sep
London17:46 → 14:3212:360 min12:3648 min1 Sep
Durban18:46 → 15:3211:330 min11:3248 min1 Sep
Dubai20:46 → 17:3211:550 min11:5548 min1 Sep
Delhi22:16 → 19:0211:570 min11:5748 min1 Sep
Kolkata22:16 → 19:0211:130 min11:1348 min1 Sep
Singapore00:46 → 21:3212:410 min12:4148 min1 Sep
Sydney02:46 → 23:3211:320 min11:3248 min1 Sep
Suva04:46 → 01:3211:430 min11:4348 min1 Sep
Profile · tradition
pac-rp@2026.1 · smarta
Rule
ganesha-chaturthi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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