Ruling · Sūrya Ṣaṣṭhī (Chhath) · 1959

Friday 6 November

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 0 min 08 s away. 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 Thursday 5 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

Midday of Friday 6 November

Taken. Ṣaṣṭhī reaches neither midday; the rule takes the second day.

madhyāhna begins 11:38  12:26 madhyāhna ends
Ṣaṣṭhī ends 11:37:26
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 13:55 on Thu 5 Nov to 11:37 on Fri 6 Nov.

    1959-11-05T05:55:01Z → 1959-11-06T03:37:27Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 5th, 11:38–12:26 on the 6th.

    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 5th and 0 of 48 on the 6th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Neither midday qualifies. The rule takes the second day.

    priority: unstated → second-day · margin 8 s < 300 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 1959: Friday 6 November.

    confidence: boundary (margin)

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 1959 falls on Friday 6 November. Ṣaṣṭhī runs from 13:55 on Thu 5 Nov to 11:37 on Fri 6 Nov, and reaches madhyāhna on neither day. It is 0 min 08 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1959/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 6 Nov
Ahargaṇa, classicalDisc centre, no refractionFri 6 Nov
compat-drikpanchangComparison profileFri 6 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 5thCoveredMadhyāhna 6thCoveredRuled
Los Angeles21:55 → 19:3711:1248 min11:120 min5 Nov
Chicago23:55 → 21:3711:1048 min11:100 min5 Nov
Jersey City00:55 → 22:3711:1648 min11:160 min5 Nov
Port of Spain01:55 → 23:3711:2648 min11:260 min5 Nov
London05:55 → 03:3711:2048 min11:200 min5 Nov
Durban07:55 → 05:3711:1648 min11:160 min5 Nov
Dubai09:55 → 07:3711:3848 min11:380 min5 Nov
Delhi11:25 → 09:0711:4148 min11:410 min5 Nov
Kolkata11:25 → 09:0710:5619 min10:560 min5 Nov
Singapore13:25 → 11:0711:540 min11:540 min6 Nov
Sydney15:55 → 13:3711:150 min11:1548 min6 Nov
Suva17:55 → 15:3711:260 min11:2648 min6 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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