Ruling · Gaṅgotpatti (Ganga Saptami) · 2010

Thursday 20 May

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 490 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 Wednesday 19 May

Saptamī is absent from madhyāhna. Not taken.

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

0 of 48 minutes covered

Midday of Thursday 20 May

Taken. The only midday Saptamī reaches.

madhyāhna begins 11:51  12:39 madhyāhna ends
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 23:00 on Wed 19 May to 20:49 on Thu 20 May.

    2010-05-19T14:59:40Z → 2010-05-20T12:48:48Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:51–12:39 on the 19th, 11:51–12:39 on the 20th.

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

  3. 03

    Rule

    Saptamī must be present during madhyāhna. It covers 0 of 48 minutes on the 19th and 48 of 48 on the 20th.

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

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: purvaviddha → only-day · margin 29394 s

  5. 05

    Ruling

    Gaṅgotpatti, Baoding, 2010: Thursday 20 May.

    confidence: determinate

Say it like this

In Baoding, Gaṅgotpatti (Ganga Saptami) 2010 falls on Thursday 20 May. Saptamī runs from 23:00 on Wed 19 May to 20:49 on Thu 20 May and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2010/gangotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 20 May
Ahargaṇa, classicalDisc centre, no refractionThu 20 May
compat-drikpanchangComparison profileThu 20 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 19thCoveredMadhyāhna 20thCoveredRuled
Los Angeles08:00 → 05:4912:2648 min12:260 min19 May
Chicago10:00 → 07:4912:2348 min12:230 min19 May
Jersey City11:00 → 08:4912:2948 min12:290 min19 May
Port of Spain11:00 → 08:4911:3948 min11:390 min19 May
London16:00 → 13:4912:330 min12:3348 min20 May
Durban17:00 → 14:4911:280 min11:2848 min20 May
Dubai19:00 → 16:4911:510 min11:5148 min20 May
Delhi20:30 → 18:1911:540 min11:5448 min20 May
Kolkata20:30 → 18:1911:090 min11:0948 min20 May
Singapore23:00 → 20:4912:370 min12:3748 min20 May
Sydney01:00 → 22:4911:270 min11:2848 min20 May
Suva03:00 → 00:4911:390 min11:3948 min20 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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