Ruling · Sūrya Ṣaṣṭhī (Chhath) · 2083

Sunday 14 November

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 4 min 45 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 Sunday 14 November

Taken. The only midday Ṣaṣṭhī reaches.

madhyāhna begins 11:39  12:27 madhyāhna ends
Ṣaṣṭhī begins 11:43:16
10:5111:1511:3912:0312:2712:5113:15

43 of 48 minutes covered, the last 43

Midday of Monday 15 November

Ṣaṣṭhī is absent from madhyāhna. Not taken.

madhyāhna begins 11:39  12:27 madhyāhna ends
10:5111:1511:3912:0312:2712:5113:15

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Ṣaṣṭhī runs from 11:43 on Sun 14 Nov to 09:41 on Mon 15 Nov.

    2083-11-14T03:43:16Z → 2083-11-15T01:40:56Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 14th, 11:39–12:27 on the 15th.

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

  3. 03

    Rule

    Ṣaṣṭhī must be present during madhyāhna. It covers 43 of 48 minutes on the 14th and 0 of 48 on the 15th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 285 s < 300 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 2083: Sunday 14 November.

    confidence: boundary (margin)

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 2083 falls on Sunday 14 November. Ṣaṣṭhī runs from 11:43 on Sun 14 Nov to 09:41 on Mon 15 Nov and covers 43 of 48 minutes of madhyāhna that midday. It is 4 min 45 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2083/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 14 Nov
Ahargaṇa, classicalDisc centre, no refractionSun 14 Nov
compat-drikpanchangComparison profileSun 14 Nov
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/surya-shashthi · ruleset 2026.3-draft

Month
Kārtika, amānta
Pakṣa · aṅga
Śukla · Ṣaṣṭhī
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 104

“S 6 Nadi sasthi, Skanda sasthi (Madras), Surya sasthi, Chhat (Bihar).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceṢaṣṭhīMadhyāhna 14thCoveredMadhyāhna 15thCoveredRuled
Los Angeles19:43 → 17:4111:1348 min11:140 min14 Nov
Chicago21:43 → 19:4111:1148 min11:110 min14 Nov
Jersey City22:43 → 20:4111:1748 min11:170 min14 Nov
Port of Spain23:43 → 21:4111:2748 min11:270 min14 Nov
London03:43 → 01:4111:2148 min11:210 min14 Nov
Durban05:43 → 03:4111:1748 min11:170 min14 Nov
Dubai07:43 → 05:4111:3948 min11:390 min14 Nov
Delhi09:13 → 07:1111:4248 min11:420 min14 Nov
Kolkata09:13 → 07:1110:5748 min10:570 min14 Nov
Singapore11:43 → 09:4112:2548 min12:250 min14 Nov
Sydney14:43 → 12:4112:160 min12:1625 min15 Nov
Suva15:43 → 13:4111:270 min11:2748 min15 Nov
Profile · tradition
pac-rp@2026.1 · smarta
Rule
surya-shashthi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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