Ruling · Sūrya Ṣaṣṭhī (Chhath) · 1977

Wednesday 16 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 465 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 Tuesday 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 Wednesday 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 22:31 on Tue 15 Nov to 20:11 on Wed 16 Nov.

    1977-11-15T14:31:03Z → 1977-11-16T12:11:29Z

  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 27886 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 1977: Wednesday 16 November.

    confidence: determinate

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 1977 falls on Wednesday 16 November. Ṣaṣṭhī runs from 22:31 on Tue 15 Nov to 20:11 on Wed 16 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1977/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 16 Nov
Ahargaṇa, classicalDisc centre, no refractionWed 16 Nov
compat-drikpanchangComparison profileWed 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 Angeles06:31 → 04:1111:1448 min11:140 min15 Nov
Chicago08:31 → 06:1111:1148 min11:110 min15 Nov
Jersey City09:31 → 07:1111:1748 min11:170 min15 Nov
Port of Spain10:31 → 08:1111:2748 min11:270 min15 Nov
London14:31 → 12:1111:210 min11:2148 min16 Nov
Durban16:31 → 14:1111:170 min11:1748 min16 Nov
Dubai18:31 → 16:1111:390 min11:3948 min16 Nov
Delhi20:01 → 17:4111:420 min11:4248 min16 Nov
Kolkata20:01 → 17:4110:570 min10:5748 min16 Nov
Singapore22:01 → 19:4111:550 min11:5548 min16 Nov
Sydney01:31 → 23:1112:160 min12:1648 min16 Nov
Suva02:31 → 00:1111:270 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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