Ruling · Śaṅkara Jayantī · 2023

Monday 24 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

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 Monday 24 April

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

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

48 of 48 minutes covered

Midday of Tuesday 25 April

Qualifies with 18 of 48 minutes. Not taken.

madhyāhna begins 11:53  12:41 madhyāhna ends
Pañcamī ends 12:10:36
11:0511:2911:5312:1712:4113:0513:29

18 of 48 minutes covered, the first 18

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

How it was decided

  1. 01

    Aṅga

    Pañcamī runs from 10:55 on Mon 24 Apr to 12:11 on Tue 25 Apr.

    2023-04-24T02:55:27Z → 2023-04-25T04:10:36Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:53–12:41 on the 24th, 11:53–12:41 on the 25th.

    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 24th and 18 of 48 on the 25th.

    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 1084 s

  5. 05

    Ruling

    Śaṅkara Jayantī, Baoding, 2023: Monday 24 April.

    confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Śaṅkara Jayantī 2023 falls on Monday 24 April. Pañcamī runs from 10:55 on Mon 24 Apr to 12:11 on Tue 25 Apr and covers all of madhyāhna that midday. It also reaches the next midday for 18 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/2023/shankara-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 24 Apr
Ahargaṇa, classicalDisc centre, no refractionMon 24 Apr
compat-drikpanchangComparison profileMon 24 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 24thCoveredMadhyāhna 25thCoveredRuled
Los Angeles19:55 → 21:1112:2748 min12:270 min24 Apr
Chicago21:55 → 23:1112:2548 min12:250 min24 Apr
Jersey City22:55 → 00:1112:3148 min12:310 min24 Apr
Port of Spain22:55 → 00:1111:4048 min11:400 min24 Apr
London03:55 → 05:1112:3548 min12:350 min24 Apr
Durban04:55 → 06:1111:3048 min11:300 min24 Apr
Dubai06:55 → 08:1111:5348 min11:530 min24 Apr
Delhi08:25 → 09:4111:5648 min11:550 min24 Apr
Kolkata08:25 → 09:4111:1148 min11:110 min24 Apr
Singapore10:55 → 12:1112:3948 min12:390 min24 Apr
Sydney12:55 → 14:1111:290 min11:2948 min25 Apr
Suva14:55 → 16:1111:400 min11:4048 min25 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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