Ruling · Sūrya Ṣaṣṭhī (Chhath) · 1964

Tuesday 10 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 388 minutes.

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 Tuesday 10 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 11 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 02:33 on Tue 10 Nov to 05:10 on Wed 11 Nov.

    1964-11-09T18:33:29Z → 1964-11-10T21:10:29Z

  2. 02

    Kāla

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

    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 10th and 0 of 48 on the 11th.

    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 23251 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 1964: Tuesday 10 November.

    confidence: determinate

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 1964 falls on Tuesday 10 November. Ṣaṣṭhī runs from 02:33 on Tue 10 Nov to 05:10 on Wed 11 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1964/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 10 Nov
Ahargaṇa, classicalDisc centre, no refractionTue 10 Nov
compat-drikpanchangComparison profileTue 10 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 9thCoveredMadhyāhna 10thCoveredRuled
Los Angeles10:33 → 13:1011:1348 min11:1348 min9 Nov
Chicago12:33 → 15:1011:100 min11:1048 min10 Nov
Jersey City13:33 → 16:1011:160 min11:1648 min10 Nov
Port of Spain14:33 → 17:1011:260 min11:2648 min10 Nov
London18:33 → 21:1011:200 min11:2048 min10 Nov
Durban20:33 → 23:1011:160 min11:1648 min10 Nov
Dubai22:33 → 01:1011:390 min11:3948 min10 Nov
Delhi00:03 → 02:4011:410 min11:4148 min10 Nov
Kolkata00:03 → 02:4010:560 min10:5648 min10 Nov
Singapore02:03 → 04:4011:540 min11:5548 min10 Nov
Sydney04:33 → 07:1011:150 min11:1548 min10 Nov
Suva06:33 → 09:1011:260 min11:2648 min10 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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