Ruling · Gaṇeśa Jayantī (Maghi Ganesh Jayanti) · 1921

Saturday 12 February

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 99 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

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

Midday of Friday 11 February

Caturthī is absent from madhyāhna. Not taken.

madhyāhna begins 11:31  12:19 madhyāhna ends
10:4311:0711:3111:5512:1912:4313:07

0 of 48 minutes covered

Midday of Saturday 12 February

Taken. The only midday Caturthī reaches.

madhyāhna begins 11:31  12:19 madhyāhna ends
10:4311:0711:3111:5512:1912:4313:07

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 13:58 on Fri 11 Feb to 15:04 on Sat 12 Feb.

    1921-02-11T05:57:57Z → 1921-02-12T07:04:09Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:31–12:19 on the 11th, 11:31–12:19 on the 12th.

    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 11th and 48 of 48 on the 12th.

    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 5954 s

  5. 05

    Ruling

    Gaṇeśa Jayantī, Daqing, 1921: Saturday 12 February.

    confidence: determinate

Say it like this

In Daqing, Gaṇeśa Jayantī (Maghi Ganesh Jayanti) 1921 falls on Saturday 12 February. Caturthī runs from 13:58 on Fri 11 Feb to 15:04 on Sat 12 Feb and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1921/ganesha-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 12 Feb
Ahargaṇa, classicalDisc centre, no refractionSat 12 Feb
compat-drikpanchangComparison profileSat 12 Feb
No institution has a recorded ruling for Daqing.

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 11thCoveredMadhyāhna 12thCoveredRuled
Los Angeles21:58 → 23:0411:4448 min11:440 min11 Feb
Chicago23:58 → 01:0411:4148 min11:410 min11 Feb
Jersey City00:58 → 02:0411:4748 min11:470 min11 Feb
Port of Spain01:58 → 03:0411:5748 min11:570 min11 Feb
London05:58 → 07:0411:5148 min11:510 min11 Feb
Durban07:58 → 09:0411:4648 min11:460 min11 Feb
Dubai09:58 → 11:0412:0948 min12:090 min11 Feb
Delhi11:28 → 12:3412:1248 min12:1223 min11 Feb
Kolkata11:28 → 12:3411:2747 min11:2748 min11 Feb
Singapore12:58 → 14:0411:550 min11:5548 min12 Feb
Sydney15:58 → 17:0411:450 min11:4548 min12 Feb
Suva17:58 → 19:0411:570 min11:5748 min12 Feb
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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