Ruling · Sūrya Ṣaṣṭhī (Chhath) · 2091

Friday 16 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 428 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 15 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 16 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 20:36 on Thu 15 Nov to 19:35 on Fri 16 Nov.

    2091-11-15T12:35:31Z → 2091-11-16T11:34:33Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 15th, 11:39–12:27 on the 16th.

    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 15th and 48 of 48 on the 16th.

    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 25658 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 2091: Friday 16 November.

    confidence: determinate

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 2091 falls on Friday 16 November. Ṣaṣṭhī runs from 20:36 on Thu 15 Nov to 19:35 on Fri 16 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2091/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 16 Nov
Ahargaṇa, classicalDisc centre, no refractionFri 16 Nov
compat-drikpanchangComparison profileFri 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 15thCoveredMadhyāhna 16thCoveredRuled
Los Angeles04:36 → 03:3511:1448 min11:140 min15 Nov
Chicago06:36 → 05:3511:1148 min11:110 min15 Nov
Jersey City07:36 → 06:3511:1748 min11:170 min15 Nov
Port of Spain08:36 → 07:3511:2748 min11:270 min15 Nov
London12:36 → 11:3511:210 min11:2113 min16 Nov
Durban14:36 → 13:3511:170 min11:1748 min16 Nov
Dubai16:36 → 15:3511:390 min11:4048 min16 Nov
Delhi18:06 → 17:0511:420 min11:4248 min16 Nov
Kolkata18:06 → 17:0510:570 min10:5748 min16 Nov
Singapore20:36 → 19:3512:250 min12:2648 min16 Nov
Sydney23:36 → 22:3512:160 min12:1648 min16 Nov
Suva00:36 → 23:3511:270 min11:2748 min16 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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