Ruling · Śaṅkara Jayantī · 1968

Thursday 2 May

Boundaryin Daqing, under the Rashtriya Panchang method. A threshold is only 0 min 24 s away. Say “contested”.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Thursday 2 May

Taken. The only midday Pañcamī reaches.

madhyāhna begins 11:13  12:01 madhyāhna ends
10:2510:4911:1311:3712:0112:2512:49

48 of 48 minutes covered

Midday of Friday 3 May

Pañcamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:13  12:01 madhyāhna ends
Pañcamī ends 11:12:52
10:2510:4911:1311:3712:0112:2512:49

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Pañcamī runs from 09:14 on Thu 2 May to 11:13 on Fri 3 May.

    1968-05-02T01:13:39Z → 1968-05-03T03:12:53Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:13–12:01 on the 2nd, 11:13–12:01 on the 3rd.

    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 2nd and 0 of 48 on the 3rd.

    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 24 s < 300 s

  5. 05

    Ruling

    Śaṅkara Jayantī, Daqing, 1968: Thursday 2 May.

    confidence: boundary (margin)

Say it like this

In Daqing, Śaṅkara Jayantī 1968 falls on Thursday 2 May. Pañcamī runs from 09:14 on Thu 2 May to 11:13 on Fri 3 May and covers all of madhyāhna that midday. It is 0 min 24 s from a threshold: treat the date as contested.

ahargana.org/daqing/festivals/1968/shankara-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 2 May
Ahargaṇa, classicalDisc centre, no refractionThu 2 May
compat-drikpanchangComparison profileThu 2 May
No institution has a recorded ruling for Daqing.

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 2ndCoveredMadhyāhna 3rdCoveredRuled
Los Angeles18:14 → 20:1312:2648 min12:260 min2 May
Chicago20:14 → 22:1312:2448 min12:240 min2 May
Jersey City21:14 → 23:1312:3048 min12:290 min2 May
Port of Spain21:14 → 23:1311:3948 min11:390 min2 May
London02:14 → 04:1312:3448 min12:340 min2 May
Durban03:14 → 05:1311:2948 min11:290 min2 May
Dubai05:14 → 07:1311:5248 min11:520 min2 May
Delhi06:44 → 08:4311:5448 min11:540 min2 May
Kolkata06:44 → 08:4311:1048 min11:100 min2 May
Singapore08:44 → 10:4312:0848 min12:070 min2 May
Sydney11:14 → 13:1311:2848 min11:2848 min2 May
Suva13:14 → 15:1311:390 min11:3948 min3 May
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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