Ruling · Śaṅkara Jayantī (Shankaracharya Jayanti) · 1964

Saturday 16 May

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 0 min 33 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 Friday 15 May

Pañcamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:51  12:39 madhyāhna ends
11:0311:2711:5112:1512:3913:0313:27

0 of 48 minutes covered

Midday of Saturday 16 May

Taken. The only midday Pañcamī reaches.

madhyāhna begins 11:51  12:39 madhyāhna ends
Pañcamī ends 12:38:09
11:0311:2711:5112:1512:3913:0313:27

47 of 48 minutes covered, the first 47

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

How it was decided

  1. 01

    Aṅga

    Pañcamī runs from 15:14 on Fri 15 May to 12:38 on Sat 16 May.

    1964-05-15T07:14:05Z → 1964-05-16T04:38:09Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:51–12:39 on the 15th, 11:51–12:39 on the 16th.

    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 15th and 47 of 48 on the 16th.

    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 33 s < 300 s

  5. 05

    Ruling

    Śaṅkara Jayantī, Baoding, 1964: Saturday 16 May.

    confidence: boundary (margin)

Say it like this

In Baoding, Śaṅkara Jayantī (Shankaracharya Jayanti) 1964 falls on Saturday 16 May. Pañcamī runs from 15:14 on Fri 15 May to 12:38 on Sat 16 May and covers 47 of 48 minutes of madhyāhna that midday. It is 0 min 33 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1964/shankara-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 16 May
Ahargaṇa, classicalDisc centre, no refractionSat 16 May
compat-drikpanchangComparison profileSat 16 May
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 15thCoveredMadhyāhna 16thCoveredRuled
Los Angeles00:14 → 21:3812:2548 min12:250 min15 May
Chicago02:14 → 23:3812:2348 min12:230 min15 May
Jersey City03:14 → 00:3812:2948 min12:290 min15 May
Port of Spain03:14 → 00:3811:3848 min11:380 min15 May
London08:14 → 05:3812:3348 min12:330 min15 May
Durban09:14 → 06:3811:2848 min11:280 min15 May
Dubai11:14 → 08:3811:5148 min11:510 min15 May
Delhi12:44 → 10:0811:540 min11:540 min16 May
Kolkata12:44 → 10:0811:090 min11:090 min16 May
Singapore14:44 → 12:0812:070 min12:071 min16 May
Sydney17:14 → 14:3811:270 min11:2748 min16 May
Suva19:14 → 16:3811:380 min11:3948 min16 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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