Ruling · Gaṅgotpatti (Ganga Saptami) · 2004

Monday 26 April

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 4 min 08 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 Monday 26 April

Taken. Both middays qualify; the rule takes the first.

madhyāhna begins 11:52  12:40 madhyāhna ends
11:0411:2811:5212:1612:4013:0413:28

48 of 48 minutes covered

Midday of Tuesday 27 April

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:52  12:40 madhyāhna ends
Saptamī ends 12:44:14
11:0411:2811:5212:1612:4013:0413:28

48 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Saptamī runs from 10:44 on Mon 26 Apr to 12:44 on Tue 27 Apr.

    2004-04-26T02:44:03Z → 2004-04-27T04:44:14Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:52–12:40 on the 26th, 11:52–12:40 on the 27th.

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

  3. 03

    Rule

    Saptamī must be present during madhyāhna. It covers 48 of 48 minutes on the 26th and 48 of 48 on the 27th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102

  4. 04

    Tie-break

    Both middays qualify. Pūrvaviddhā: the first is taken.

    priority: purvaviddha → purvaviddha · margin 248 s < 300 s

  5. 05

    Ruling

    Gaṅgotpatti, Baoding, 2004: Monday 26 April.

    confidence: boundary (margin)

Say it like this

In Baoding, Gaṅgotpatti (Ganga Saptami) 2004 falls on Monday 26 April. Saptamī runs from 10:44 on Mon 26 Apr to 12:44 on Tue 27 Apr and covers all of madhyāhna that midday. It also reaches the next midday for 48 minutes; by the rule the first midday is taken. It is 4 min 08 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2004/gangotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 26 Apr
Ahargaṇa, classicalDisc centre, no refractionMon 26 Apr
compat-drikpanchangComparison profileMon 26 Apr
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/gangotpatti · ruleset 2026.3-draft

Month
Vaiśākha, amānta
Pakṣa · aṅga
Śukla · Saptamī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 102

“S 7 Gangotpatti, (madhyahna vyapini, if occurs on two successive days, the first day is to be observed), Jahnu saptami, Sarkara saptami.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceSaptamīMadhyāhna 26thCoveredMadhyāhna 27thCoveredRuled
Los Angeles19:44 → 21:4412:2748 min12:270 min26 Apr
Chicago21:44 → 23:4412:2548 min12:250 min26 Apr
Jersey City22:44 → 00:4412:3048 min12:300 min26 Apr
Port of Spain22:44 → 00:4411:4048 min11:400 min26 Apr
London03:44 → 05:4412:3548 min12:350 min26 Apr
Durban04:44 → 06:4411:2948 min11:290 min26 Apr
Dubai06:44 → 08:4411:5348 min11:530 min26 Apr
Delhi08:14 → 10:1411:5548 min11:550 min26 Apr
Kolkata08:14 → 10:1411:1048 min11:100 min26 Apr
Singapore10:44 → 12:4412:3848 min12:386 min26 Apr
Sydney12:44 → 14:4411:290 min11:2948 min27 Apr
Suva14:44 → 16:4411:400 min11:4048 min27 Apr
Profile · tradition
pac-rp@2026.1 · smarta
Rule
gangotpatti@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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