Ruling · Śaṅkara Jayantī · 1961

Wednesday 19 April

Boundaryin Baoding, under the Rashtriya Panchang method. Both middays qualify and the rule does not say which to take. Say “contested”.

Decide it for

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 April

Taken. Both middays qualify; the rule is silent, and this one is covered longer.

madhyāhna begins 11:54  12:42 madhyāhna ends
Pañcamī begins 11:26:24
11:0611:3011:5412:1812:4213:0613:30

48 of 48 minutes covered

Midday of Thursday 20 April

Qualifies with 40 of 48 minutes. Not taken.

madhyāhna begins 11:53  12:41 madhyāhna ends
Pañcamī ends 12:33:47
11:0511:2911:5312:1712:4113:0513:29

40 of 48 minutes covered, the first 40

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

How it was decided

  1. 01

    Aṅga

    Pañcamī runs from 11:26 on Wed 19 Apr to 12:34 on Thu 20 Apr.

    1961-04-19T03:26:24Z → 1961-04-20T04:33:47Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 19th, 11:53–12:41 on the 20th.

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

  3. 03

    Rule

    Pañcamī must be present during madhyāhna. It covers 48 of 48 minutes on the 19th and 40 of 48 on the 20th.

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

  4. 04

    Tie-break

    Both middays qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

    priority: unstated → greater-coverage · margin 462 s

  5. 05

    Ruling

    Śaṅkara Jayantī, Baoding, 1961: Wednesday 19 April.

    confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Śaṅkara Jayantī 1961 falls on Wednesday 19 April. Pañcamī runs from 11:26 on Wed 19 Apr to 12:34 on Thu 20 Apr and covers all of madhyāhna that midday. It also reaches the next midday for 40 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.

ahargana.org/baoding/festivals/1961/shankara-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 19 Apr
Ahargaṇa, classicalDisc centre, no refractionWed 19 Apr
compat-drikpanchangComparison profileWed 19 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/shankara-jayanti · ruleset 2026.3-draft

Month
Vaiśākha, amānta
Pakṣa · aṅga
Śukla · Pañcamī
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 102

“S 5 Sankara jayanti.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePañcamīMadhyāhna 19thCoveredMadhyāhna 20thCoveredRuled
Los Angeles19:26 → 20:3411:2848 min11:280 min19 Apr
Chicago21:26 → 22:3411:2648 min11:260 min19 Apr
Jersey City22:26 → 23:3411:3248 min11:320 min19 Apr
Port of Spain23:26 → 00:3411:4148 min11:410 min19 Apr
London04:26 → 05:3412:3648 min12:360 min19 Apr
Durban05:26 → 06:3411:3148 min11:310 min19 Apr
Dubai07:26 → 08:3411:5448 min11:540 min19 Apr
Delhi08:56 → 10:0411:5648 min11:560 min19 Apr
Kolkata08:56 → 10:0411:1248 min11:120 min19 Apr
Singapore10:56 → 12:0412:1048 min12:100 min19 Apr
Sydney13:26 → 14:3411:300 min11:3048 min20 Apr
Suva15:26 → 16:3411:410 min11:4148 min20 Apr
Profile · tradition
pac-rp@2026.1 · smarta
Rule
shankara-jayanti@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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