Ruling · Sūrya Ṣaṣṭhī (Chhath) · 1920

Tuesday 16 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 Tuesday 16 November

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

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

48 of 48 minutes covered

Midday of Wednesday 17 November

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:39  12:27 madhyāhna ends
Ṣaṣṭhī ends 12:59:05
10:5111:1511:3912:0312:2712:5113:15

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 10:28 on Tue 16 Nov to 12:59 on Wed 17 Nov.

    1920-11-16T02:28:11Z → 1920-11-17T04:59:05Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 16th, 11:39–12:27 on the 17th.

    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 16th and 48 of 48 on the 17th.

    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 1929 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 1920: Tuesday 16 November.

    confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 1920 falls on Tuesday 16 November. Ṣaṣṭhī runs from 10:28 on Tue 16 Nov to 12:59 on Wed 17 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/1920/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 16 Nov
Ahargaṇa, classicalDisc centre, no refractionTue 16 Nov
compat-drikpanchangComparison profileTue 16 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 16thCoveredMadhyāhna 17thCoveredRuled
Los Angeles18:28 → 20:5911:1448 min11:140 min16 Nov
Chicago20:28 → 22:5911:1148 min11:110 min16 Nov
Jersey City21:28 → 23:5911:1748 min11:170 min16 Nov
Port of Spain22:28 → 00:5911:2748 min11:270 min16 Nov
London02:28 → 04:5911:2148 min11:210 min16 Nov
Durban04:28 → 06:5911:1748 min11:170 min16 Nov
Dubai06:28 → 08:5911:3948 min11:400 min16 Nov
Delhi07:58 → 10:2911:4248 min11:420 min16 Nov
Kolkata07:58 → 10:2910:5748 min10:570 min16 Nov
Singapore09:28 → 11:5911:2548 min11:2634 min16 Nov
Sydney12:28 → 14:5911:160 min11:1648 min17 Nov
Suva14:28 → 16:5911:270 min11:2748 min17 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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