Ruling · Sūrya Ṣaṣṭhī (Chhath) · 2031

Thursday 20 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 93 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 Wednesday 19 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 Thursday 20 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 16:30 on Wed 19 Nov to 14:00 on Thu 20 Nov.

    2031-11-19T08:29:37Z → 2031-11-20T06:00:20Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 19th, 11:39–12:27 on the 20th.

    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 19th and 48 of 48 on the 20th.

    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 5573 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 2031: Thursday 20 November.

    confidence: determinate

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 2031 falls on Thursday 20 November. Ṣaṣṭhī runs from 16:30 on Wed 19 Nov to 14:00 on Thu 20 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2031/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 20 Nov
Ahargaṇa, classicalDisc centre, no refractionThu 20 Nov
compat-drikpanchangComparison profileThu 20 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 19thCoveredMadhyāhna 20thCoveredRuled
Los Angeles00:30 → 22:0011:1448 min11:140 min19 Nov
Chicago02:30 → 00:0011:1248 min11:120 min19 Nov
Jersey City03:30 → 01:0011:1748 min11:180 min19 Nov
Port of Spain04:30 → 02:0011:2748 min11:280 min19 Nov
London08:30 → 06:0011:2248 min11:220 min19 Nov
Durban10:30 → 08:0011:1748 min11:180 min19 Nov
Dubai12:30 → 10:0011:400 min11:400 min20 Nov
Delhi14:00 → 11:3011:420 min11:420 min20 Nov
Kolkata14:00 → 11:3010:580 min10:5832 min20 Nov
Singapore16:30 → 14:0012:260 min12:2648 min20 Nov
Sydney19:30 → 17:0012:170 min12:1748 min20 Nov
Suva20:30 → 18:0011:280 min11:2848 min20 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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