Ruling · Śaṅkara Jayantī · 1931

Thursday 23 April

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 1 min 50 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 Wednesday 22 April

Pañcamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:53  12:41 madhyāhna ends
Pañcamī begins 12:43:02
11:0511:2911:5312:1712:4113:0513:29

0 of 48 minutes covered

Midday of Thursday 23 April

Taken. The only midday Pañcamī reaches.

madhyāhna begins 11:53  12:41 madhyāhna ends
Pañcamī ends 12:27:08
11:0511:2911:5312:1712:4113:0513:29

34 of 48 minutes covered, the first 34

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

How it was decided

  1. 01

    Aṅga

    Pañcamī runs from 12:43 on Wed 22 Apr to 12:27 on Thu 23 Apr.

    1931-04-22T04:43:02Z → 1931-04-23T04:27:09Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:53–12:41 on the 22nd, 11:53–12:41 on the 23rd.

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

  3. 03

    Rule

    Pañcamī must be present during madhyāhna. It covers 0 of 48 minutes on the 22nd and 34 of 48 on the 23rd.

    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: unstated → only-day · margin 110 s < 300 s

  5. 05

    Ruling

    Śaṅkara Jayantī, Baoding, 1931: Thursday 23 April.

    confidence: boundary (margin)

Say it like this

In Baoding, Śaṅkara Jayantī 1931 falls on Thursday 23 April. Pañcamī runs from 12:43 on Wed 22 Apr to 12:27 on Thu 23 Apr and covers 34 of 48 minutes of madhyāhna that midday. It is 1 min 50 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1931/shankara-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 23 Apr
Ahargaṇa, classicalDisc centre, no refractionThu 23 Apr
compat-drikpanchangComparison profileThu 23 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 22ndCoveredMadhyāhna 23rdCoveredRuled
Los Angeles20:43 → 20:2711:2848 min11:280 min22 Apr
Chicago22:43 → 22:2711:2648 min11:250 min22 Apr
Jersey City23:43 → 23:2711:3148 min11:310 min22 Apr
Port of Spain00:43 → 00:2711:4148 min11:410 min22 Apr
London05:43 → 05:2712:3648 min12:360 min22 Apr
Durban06:43 → 06:2711:3048 min11:300 min22 Apr
Dubai08:43 → 08:2711:5448 min11:530 min22 Apr
Delhi10:13 → 09:5711:5648 min11:560 min22 Apr
Kolkata10:13 → 09:5711:1148 min11:110 min22 Apr
Singapore11:43 → 11:2711:3944 min11:390 min22 Apr
Sydney14:43 → 14:2711:300 min11:2948 min23 Apr
Suva16:43 → 16:2711:410 min11:4148 min23 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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