Ruling · Sūrya Ṣaṣṭhī (Chhath) · 1982

Sunday 21 November

Boundaryin Baoding, under the Rashtriya Panchang method. Both middays qualify and the rule does not say which to take. 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 Sunday 21 November

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

madhyāhna begins 11:40  12:28 madhyāhna ends
10:5211:1611:4012:0412:2812:5213:16

48 of 48 minutes covered

Midday of Monday 22 November

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:40  12:28 madhyāhna ends
Ṣaṣṭhī ends 12:48:18
10:5211:1611:4012:0412:2812:5213:16

48 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 10:09 on Sun 21 Nov to 12:48 on Mon 22 Nov.

    1982-11-21T02:08:44Z → 1982-11-22T04:48:19Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:40–12:28 on the 21st, 11:40–12:28 on the 22nd.

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

  3. 03

    Rule

    Ṣaṣṭhī must be present during madhyāhna. It covers 48 of 48 minutes on the 21st and 48 of 48 on the 22nd.

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

  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 1219 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 1982: Sunday 21 November.

    confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 1982 falls on Sunday 21 November. Ṣaṣṭhī runs from 10:09 on Sun 21 Nov to 12:48 on Mon 22 Nov and covers all of madhyāhna that midday. It also reaches the next midday for 48 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/1982/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 21 Nov
Ahargaṇa, classicalDisc centre, no refractionSun 21 Nov
compat-drikpanchangComparison profileSun 21 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 21stCoveredMadhyāhna 22ndCoveredRuled
Los Angeles18:09 → 20:4811:1548 min11:150 min21 Nov
Chicago20:09 → 22:4811:1248 min11:130 min21 Nov
Jersey City21:09 → 23:4811:1848 min11:180 min21 Nov
Port of Spain22:09 → 00:4811:2848 min11:280 min21 Nov
London02:09 → 04:4811:2248 min11:220 min21 Nov
Durban04:09 → 06:4811:1848 min11:180 min21 Nov
Dubai06:09 → 08:4811:4048 min11:410 min21 Nov
Delhi07:39 → 10:1811:4348 min11:430 min21 Nov
Kolkata07:39 → 10:1810:5848 min10:580 min21 Nov
Singapore10:09 → 12:4812:2648 min12:2722 min21 Nov
Sydney13:09 → 15:4812:170 min12:1748 min22 Nov
Suva14:09 → 16:4811:280 min11:2848 min22 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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