Ruling · Sūrya Ṣaṣṭhī (Chhath) · 1973

Thursday 1 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 459 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 31 October

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 Thursday 1 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

Ṣaṣṭhī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Ṣaṣṭhī runs from 20:04 on Wed 31 Oct to 22:47 on Thu 1 Nov.

    1973-10-31T12:04:13Z → 1973-11-01T14:47:14Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 31st, 11:38–12:26 on the 1st.

    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 31st and 48 of 48 on the 1st.

    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 27519 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 1973: Thursday 1 November.

    confidence: determinate

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 1973 falls on Thursday 1 November. Ṣaṣṭhī runs from 20:04 on Wed 31 Oct to 22:47 on Thu 1 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1973/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 1 Nov
Ahargaṇa, classicalDisc centre, no refractionThu 1 Nov
compat-drikpanchangComparison profileThu 1 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 31stCoveredMadhyāhna 1stCoveredRuled
Los Angeles04:04 → 06:4711:1248 min11:120 min31 Oct
Chicago06:04 → 08:4711:1048 min11:100 min31 Oct
Jersey City07:04 → 09:4711:1648 min11:160 min31 Oct
Port of Spain08:04 → 10:4711:2648 min11:260 min31 Oct
London12:04 → 14:4711:204 min11:2048 min1 Nov
Durban14:04 → 16:4711:160 min11:1648 min1 Nov
Dubai16:04 → 18:4711:380 min11:3848 min1 Nov
Delhi17:34 → 20:1711:410 min11:4148 min1 Nov
Kolkata17:34 → 20:1710:560 min10:5648 min1 Nov
Singapore19:34 → 22:1711:540 min11:5448 min1 Nov
Sydney23:04 → 01:4712:150 min12:1548 min1 Nov
Suva00:04 → 02:4711:260 min11:2648 min1 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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