Ruling · Gaṅgotpatti (Ganga Saptami) · 1980

Monday 21 April

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 566 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 April

Saptamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:53  12:41 madhyāhna ends
11:0511:2911:5312:1712:4113:0513:29

0 of 48 minutes covered

Midday of Monday 21 April

Taken. The only midday Saptamī reaches.

madhyāhna begins 11:53  12:41 madhyāhna ends
11:0511:2911:5312:1712:4113:0513:29

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 22:07 on Sun 20 Apr to 22:30 on Mon 21 Apr.

    1980-04-20T14:07:29Z → 1980-04-21T14:29:41Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:53–12:41 on the 20th, 11:53–12:41 on the 21st.

    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 20th and 48 of 48 on the 21st.

    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 33965 s

  5. 05

    Ruling

    Gaṅgotpatti, Baoding, 1980: Monday 21 April.

    confidence: determinate

Say it like this

In Baoding, Gaṅgotpatti (Ganga Saptami) 1980 falls on Monday 21 April. Saptamī runs from 22:07 on Sun 20 Apr to 22:30 on Mon 21 Apr and covers all of madhyāhna that midday.

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

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 21 Apr
Ahargaṇa, classicalDisc centre, no refractionMon 21 Apr
compat-drikpanchangComparison profileMon 21 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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles06:07 → 06:3011:2848 min11:280 min20 Apr
Chicago08:07 → 08:3011:2648 min11:260 min20 Apr
Jersey City09:07 → 09:3011:3148 min11:310 min20 Apr
Port of Spain10:07 → 10:3011:4148 min11:410 min20 Apr
London15:07 → 15:3012:360 min12:3648 min21 Apr
Durban16:07 → 16:3011:310 min11:3048 min21 Apr
Dubai18:07 → 18:3011:540 min11:5448 min21 Apr
Delhi19:37 → 20:0011:560 min11:5648 min21 Apr
Kolkata19:37 → 20:0011:120 min11:1148 min21 Apr
Singapore21:37 → 22:0012:100 min12:0948 min21 Apr
Sydney00:07 → 00:3011:300 min11:3048 min21 Apr
Suva02:07 → 02:3011:410 min11:4148 min21 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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