Ruling · Sūrya Ṣaṣṭhī (Chhath) · 1937

Tuesday 9 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 500 minutes.

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 Tuesday 9 November

Taken. The only midday Ṣaṣṭhī reaches.

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

48 of 48 minutes covered

Midday of Wednesday 10 November

Ṣaṣṭhī is absent from madhyāhna. Not taken.

madhyāhna begins 11:38  12:26 madhyāhna ends
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 01:04 on Tue 9 Nov to 03:18 on Wed 10 Nov.

    1937-11-08T17:04:01Z → 1937-11-09T19:17:48Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 9th, 11:38–12:26 on the 10th.

    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 9th and 0 of 48 on the 10th.

    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 30004 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 1937: Tuesday 9 November.

    confidence: determinate

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 1937 falls on Tuesday 9 November. Ṣaṣṭhī runs from 01:04 on Tue 9 Nov to 03:18 on Wed 10 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1937/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 9 Nov
Ahargaṇa, classicalDisc centre, no refractionTue 9 Nov
compat-drikpanchangComparison profileTue 9 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 8thCoveredMadhyāhna 9thCoveredRuled
Los Angeles09:04 → 11:1811:1348 min11:135 min8 Nov
Chicago11:04 → 13:1811:1048 min11:1048 min8 Nov
Jersey City12:04 → 14:1811:160 min11:1648 min9 Nov
Port of Spain13:04 → 15:1811:260 min11:2648 min9 Nov
London17:04 → 19:1811:200 min11:2048 min9 Nov
Durban19:04 → 21:1811:160 min11:1648 min9 Nov
Dubai21:04 → 23:1811:380 min11:3848 min9 Nov
Delhi22:34 → 00:4811:410 min11:4148 min9 Nov
Kolkata22:34 → 00:4810:560 min10:5648 min9 Nov
Singapore00:24 → 02:3811:440 min11:4448 min9 Nov
Sydney03:04 → 05:1811:150 min11:1548 min9 Nov
Suva05:04 → 07:1811:260 min11:2648 min9 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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