Ruling · Sūrya Ṣaṣṭhī (Chhath) · 1966

Friday 18 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 256 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 Thursday 17 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

Midday of Friday 18 November

Taken. The only midday Ṣaṣṭhī reaches.

madhyāhna begins 11:39  12:27 madhyāhna ends
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 16:42 on Thu 17 Nov to 17:40 on Fri 18 Nov.

    1966-11-17T08:42:29Z → 1966-11-18T09:40:22Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 17th, 11:39–12:27 on the 18th.

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

  3. 03

    Rule

    Ṣaṣṭhī must be present during madhyāhna. It covers 0 of 48 minutes on the 17th and 48 of 48 on the 18th.

    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 15339 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 1966: Friday 18 November.

    confidence: determinate

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 1966 falls on Friday 18 November. Ṣaṣṭhī runs from 16:42 on Thu 17 Nov to 17:40 on Fri 18 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1966/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 18 Nov
Ahargaṇa, classicalDisc centre, no refractionFri 18 Nov
compat-drikpanchangComparison profileFri 18 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 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles00:42 → 01:4011:1448 min11:140 min17 Nov
Chicago02:42 → 03:4011:1148 min11:120 min17 Nov
Jersey City03:42 → 04:4011:1748 min11:170 min17 Nov
Port of Spain04:42 → 05:4011:2748 min11:270 min17 Nov
London08:42 → 09:4011:2148 min11:210 min17 Nov
Durban10:42 → 11:4011:1748 min11:1723 min17 Nov
Dubai12:42 → 13:4011:400 min11:4048 min18 Nov
Delhi14:12 → 15:1011:420 min11:4248 min18 Nov
Kolkata14:12 → 15:1010:570 min10:5848 min18 Nov
Singapore16:12 → 17:1011:550 min11:5648 min18 Nov
Sydney18:42 → 19:4011:160 min11:1648 min18 Nov
Suva20:42 → 21:4011:270 min11:2748 min18 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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