Ruling · Gaṅgotpatti (Gaṅgā Saptamī) · 2016

Thursday 12 May

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 2 min 02 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 Thursday 12 May

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

madhyāhna begins 11:51  12:39 madhyāhna ends
Saptamī begins 12:35:48
11:0311:2711:5112:1512:3913:0313:27

3 of 48 minutes covered, the last 3

Midday of Friday 13 May

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:51  12:39 madhyāhna ends
Saptamī ends 12:40:47
11:0311:2711:5112:1512:3913:0313:27

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 12:36 on Thu 12 May to 12:41 on Fri 13 May.

    2016-05-12T04:35:49Z → 2016-05-13T04:40:48Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:51–12:39 on the 12th, 11:51–12:39 on the 13th.

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

  3. 03

    Rule

    Saptamī must be present during madhyāhna. It covers 3 of 48 minutes on the 12th and 48 of 48 on the 13th.

    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 122 s < 300 s

  5. 05

    Ruling

    Gaṅgotpatti, Baoding, 2016: Thursday 12 May.

    confidence: boundary (margin)

Say it like this

In Baoding, Gaṅgotpatti (Ganga Saptami) 2016 falls on Thursday 12 May. Saptamī runs from 12:36 on Thu 12 May to 12:41 on Fri 13 May and covers 3 of 48 minutes of madhyāhna that midday. It also reaches the next midday for 48 minutes; by the rule the first midday is taken. It is 2 min 02 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2016/gangotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 12 May
Ahargaṇa, classicalDisc centre, no refractionThu 12 May
compat-drikpanchangComparison profileThu 12 May
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 12thCoveredMadhyāhna 13thCoveredRuled
Los Angeles21:36 → 21:4112:2648 min12:260 min12 May
Chicago23:36 → 23:4112:2348 min12:230 min12 May
Jersey City00:36 → 00:4112:2948 min12:290 min12 May
Port of Spain00:36 → 00:4111:3848 min11:380 min12 May
London05:36 → 05:4112:3348 min12:330 min12 May
Durban06:36 → 06:4111:2848 min11:280 min12 May
Dubai08:36 → 08:4111:5148 min11:510 min12 May
Delhi10:06 → 10:1111:5448 min11:540 min12 May
Kolkata10:06 → 10:1111:0948 min11:090 min12 May
Singapore12:36 → 12:4112:3748 min12:374 min12 May
Sydney14:36 → 14:4111:270 min11:2748 min13 May
Suva16:36 → 16:4111:390 min11:3948 min13 May
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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