Ruling · Gaṇeśa Jayantī (Maghi Ganesh Jayanti) · 1972

Thursday 20 January

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 2 min 37 s away. Say “contested”.

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 19 January

Caturthī is absent from madhyāhna. Not taken.

madhyāhna begins 12:05  12:53 madhyāhna ends
11:1711:4112:0512:2912:5313:1713:41

0 of 48 minutes covered

Midday of Thursday 20 January

Taken. The only midday Caturthī reaches.

madhyāhna begins 12:05  12:53 madhyāhna ends
Caturthī ends 12:55:43
11:1711:4112:0512:2912:5313:1713:41

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 14:51 on Wed 19 Jan to 12:56 on Thu 20 Jan.

    1972-01-19T06:50:33Z → 1972-01-20T04:55:44Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:05–12:53 on the 19th, 12:05–12:53 on the 20th.

    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 19th and 48 of 48 on the 20th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

  4. 04

    Tie-break

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

    priority: purvaviddha → only-day · margin 157 s < 300 s

  5. 05

    Ruling

    Gaṇeśa Jayantī, Baoding, 1972: Thursday 20 January.

    confidence: boundary (margin)

Say it like this

In Baoding, Gaṇeśa Jayantī (Maghi Ganesh Jayanti) 1972 falls on Thursday 20 January. Caturthī runs from 14:51 on Wed 19 Jan to 12:56 on Thu 20 Jan and covers all of madhyāhna that midday. It is 2 min 37 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1972/ganesha-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 20 Jan
Ahargaṇa, classicalDisc centre, no refractionThu 20 Jan
compat-drikpanchangComparison profileThu 20 Jan
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-jayanti · ruleset 2026.3-draft

Month
Māgha, amānta
Pakṣa · aṅga
Śukla · Caturthī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 105

“S 4 Tila caturthi and Kunda caturthi (pradosavyapini), Varada caturthi (Bengal & Orissa), Ganesa caturthi, Ganesa jayanti (madhyahnavyapini purvaviddha).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturthīMadhyāhna 19thCoveredMadhyāhna 20thCoveredRuled
Los Angeles22:51 → 20:5611:4048 min11:400 min19 Jan
Chicago00:51 → 22:5611:3748 min11:380 min19 Jan
Jersey City01:51 → 23:5611:4348 min11:430 min19 Jan
Port of Spain02:51 → 00:5611:5348 min11:530 min19 Jan
London06:51 → 04:5611:4748 min11:480 min19 Jan
Durban08:51 → 06:5611:4248 min11:430 min19 Jan
Dubai10:51 → 08:5612:0548 min12:060 min19 Jan
Delhi12:21 → 10:2612:0835 min12:080 min19 Jan
Kolkata12:21 → 10:2611:230 min11:230 min20 Jan
Singapore14:21 → 12:2612:210 min12:214 min20 Jan
Sydney17:51 → 15:5612:410 min12:4248 min20 Jan
Suva18:51 → 16:5611:530 min11:5348 min20 Jan
Profile · tradition
pac-rp@2026.1 · smarta
Rule
ganesha-jayanti@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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