Ruling · Sūrya Ṣaṣṭhī (Chhath) · 2073

Saturday 4 November

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 1 min 52 s away. Say “contested”.

Decide it for

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 Saturday 4 November

Taken. The only midday Ṣaṣṭhī reaches.

madhyāhna begins 11:38  12:26 madhyāhna ends
Ṣaṣṭhī begins 12:23:45
10:5011:1411:3812:0212:2612:5013:14

2 of 48 minutes covered, the last 2

Midday of Sunday 5 November

Ṣaṣṭhī is absent from madhyāhna. Not taken.

madhyāhna begins 11:38  12:26 madhyāhna ends
Ṣaṣṭhī ends 11:28:30
10:5011:1411:3812:0212:2612:5013:14

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 12:24 on Sat 4 Nov to 11:29 on Sun 5 Nov.

    2073-11-04T04:23:46Z → 2073-11-05T03:28:31Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 4th, 11:38–12:26 on the 5th.

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

  3. 03

    Rule

    Ṣaṣṭhī must be present during madhyāhna. It covers 2 of 48 minutes on the 4th and 0 of 48 on the 5th.

    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 112 s < 300 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 2073: Saturday 4 November.

    confidence: boundary (margin)

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 2073 falls on Saturday 4 November. Ṣaṣṭhī runs from 12:24 on Sat 4 Nov to 11:29 on Sun 5 Nov and covers 2 of 48 minutes of madhyāhna that midday. It is 1 min 52 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2073/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 4 Nov
Ahargaṇa, classicalDisc centre, no refractionSat 4 Nov
compat-drikpanchangComparison profileSat 4 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 4thCoveredMadhyāhna 5thCoveredRuled
Los Angeles21:24 → 20:2912:1348 min11:130 min4 Nov
Chicago23:24 → 22:2912:1048 min11:100 min4 Nov
Jersey City00:24 → 23:2912:1648 min11:160 min4 Nov
Port of Spain00:24 → 23:2911:2648 min11:260 min4 Nov
London04:24 → 03:2911:2048 min11:200 min4 Nov
Durban06:24 → 05:2911:1648 min11:160 min4 Nov
Dubai08:24 → 07:2911:3848 min11:380 min4 Nov
Delhi09:54 → 08:5911:4148 min11:410 min4 Nov
Kolkata09:54 → 08:5910:5648 min10:560 min4 Nov
Singapore12:24 → 11:2912:2448 min12:240 min4 Nov
Sydney15:24 → 14:2912:150 min12:1548 min5 Nov
Suva16:24 → 15:2911:260 min11:2648 min5 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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