Ruling · Gaṇeśa Jayantī (Maghi Ganesh Jayanti) · 1980

Monday 21 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 299 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 Sunday 20 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 Monday 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 20:43 on Sun 20 Jan to 17:52 on Mon 21 Jan.

    1980-01-20T12:43:16Z → 1980-01-21T09:52:04Z

  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 17921 s

  5. 05

    Ruling

    Gaṇeśa Jayantī, Baoding, 1980: Monday 21 January.

    confidence: determinate

Say it like this

In Baoding, Gaṇeśa Jayantī (Maghi Ganesh Jayanti) 1980 falls on Monday 21 January. Caturthī runs from 20:43 on Sun 20 Jan to 17:52 on Mon 21 Jan and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1980/ganesha-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 21 Jan
Ahargaṇa, classicalDisc centre, no refractionMon 21 Jan
compat-drikpanchangComparison profileMon 21 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 Angeles04:43 → 01:5211:4048 min11:400 min20 Jan
Chicago06:43 → 03:5211:3848 min11:380 min20 Jan
Jersey City07:43 → 04:5211:4348 min11:440 min20 Jan
Port of Spain08:43 → 05:5211:5348 min11:530 min20 Jan
London12:43 → 09:5211:480 min11:480 min21 Jan
Durban14:43 → 11:5211:430 min11:439 min21 Jan
Dubai16:43 → 13:5212:060 min12:0648 min21 Jan
Delhi18:13 → 15:2212:080 min12:0848 min21 Jan
Kolkata18:13 → 15:2211:230 min11:2448 min21 Jan
Singapore20:13 → 17:2212:210 min12:2248 min21 Jan
Sydney23:43 → 20:5212:420 min12:4248 min21 Jan
Suva00:43 → 21:5211:530 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

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