Ruling · Gaṇeśa Jayantī (Maghi Ganesh Jayanti) · 1923

Sunday 21 January

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 4 min 56 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 Saturday 20 January

Caturthī is absent from madhyāhna. Not taken.

madhyāhna begins 12:05  12:53 madhyāhna ends
Caturthī begins 12:58:06
11:1711:4112:0512:2912:5313:1713:41

0 of 48 minutes covered

Midday of Sunday 21 January

Taken. The only midday Caturthī reaches.

madhyāhna begins 12:05  12:53 madhyāhna ends
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 12:58 on Sat 20 Jan to 14:56 on Sun 21 Jan.

    1923-01-20T04:58:07Z → 1923-01-21T06:55:36Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:05–12:53 on the 20th, 12:05–12:53 on the 21st.

    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 20th and 48 of 48 on the 21st.

    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 296 s < 300 s

  5. 05

    Ruling

    Gaṇeśa Jayantī, Baoding, 1923: Sunday 21 January.

    confidence: boundary (margin)

Say it like this

In Baoding, Gaṇeśa Jayantī (Maghi Ganesh Jayanti) 1923 falls on Sunday 21 January. Caturthī runs from 12:58 on Sat 20 Jan to 14:56 on Sun 21 Jan and covers all of madhyāhna that midday. It is 4 min 56 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1923/ganesha-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 21 Jan
Ahargaṇa, classicalDisc centre, no refractionSun 21 Jan
compat-drikpanchangComparison profileSat 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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles20:58 → 22:5611:4048 min11:400 min20 Jan
Chicago22:58 → 00:5611:3848 min11:380 min20 Jan
Jersey City23:58 → 01:5611:4448 min11:440 min20 Jan
Port of Spain00:58 → 02:5611:5348 min11:530 min20 Jan
London04:58 → 06:5611:4848 min11:480 min20 Jan
Durban06:58 → 08:5611:4348 min11:430 min20 Jan
Dubai08:58 → 10:5612:0648 min12:060 min20 Jan
Delhi10:28 → 12:2612:0848 min12:0817 min20 Jan
Kolkata10:28 → 12:2611:2448 min11:2448 min20 Jan
Singapore11:58 → 13:5611:5141 min11:5248 min20 Jan
Sydney14:58 → 16:5611:420 min11:4248 min21 Jan
Suva16:58 → 18:5611:530 min11:5348 min21 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

About Ahargaṇa