Ruling · Gaṅgotpatti (Ganga Saptami) · 2078

Tuesday 17 May

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 4 min 23 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 Tuesday 17 May

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

madhyāhna begins 11:51  12:39 madhyāhna ends
Saptamī begins 11:55:29
11:0311:2711:5112:1512:3913:0313:27

44 of 48 minutes covered, the last 44

Midday of Wednesday 18 May

Qualifies with 7 of 48 minutes. Not taken.

madhyāhna begins 11:51  12:39 madhyāhna ends
Saptamī ends 11:58:06
11:0311:2711:5112:1512:3913:0313:27

7 of 48 minutes covered, the first 7

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

How it was decided

  1. 01

    Aṅga

    Saptamī runs from 11:55 on Tue 17 May to 11:58 on Wed 18 May.

    2078-05-17T03:55:30Z → 2078-05-18T03:58:06Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:51–12:39 on the 17th, 11:51–12:39 on the 18th.

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

  3. 03

    Rule

    Saptamī must be present during madhyāhna. It covers 44 of 48 minutes on the 17th and 7 of 48 on the 18th.

    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 263 s < 300 s

  5. 05

    Ruling

    Gaṅgotpatti, Baoding, 2078: Tuesday 17 May.

    confidence: boundary (margin)

Say it like this

In Baoding, Gaṅgotpatti (Ganga Saptami) 2078 falls on Tuesday 17 May. Saptamī runs from 11:55 on Tue 17 May to 11:58 on Wed 18 May and covers 44 of 48 minutes of madhyāhna that midday. It also reaches the next midday for 7 minutes; by the rule the first midday is taken. It is 4 min 23 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2078/gangotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 17 May
Ahargaṇa, classicalDisc centre, no refractionTue 17 May
compat-drikpanchangComparison profileTue 17 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 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles20:55 → 20:5812:2648 min12:260 min17 May
Chicago22:55 → 22:5812:2448 min12:240 min17 May
Jersey City23:55 → 23:5812:2948 min12:290 min17 May
Port of Spain23:55 → 23:5811:3948 min11:390 min17 May
London04:55 → 04:5812:3448 min12:340 min17 May
Durban05:55 → 05:5811:2848 min11:290 min17 May
Dubai07:55 → 07:5811:5248 min11:520 min17 May
Delhi09:25 → 09:2811:5448 min11:540 min17 May
Kolkata09:25 → 09:2811:0948 min11:090 min17 May
Singapore11:55 → 11:5812:3748 min12:370 min17 May
Sydney13:55 → 13:5811:280 min11:2848 min18 May
Suva15:55 → 15:5811:390 min11:3948 min18 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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