Ruling · Sūrya Ṣaṣṭhī (Chhath) · 1957

Monday 28 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 411 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 Monday 28 October

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 Tuesday 29 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

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

How it was decided

  1. 01

    Aṅga

    Ṣaṣṭhī runs from 04:20 on Mon 28 Oct to 04:47 on Tue 29 Oct.

    1957-10-27T20:20:00Z → 1957-10-28T20:47:04Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 28th, 11:38–12:26 on the 29th.

    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 28th and 0 of 48 on the 29th.

    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 24639 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 1957: Monday 28 October.

    confidence: determinate

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 1957 falls on Monday 28 October. Ṣaṣṭhī runs from 04:20 on Mon 28 Oct to 04:47 on Tue 29 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1957/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 28 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 28 Oct
compat-drikpanchangComparison profileMon 28 Oct
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 27thCoveredMadhyāhna 28thCoveredRuled
Los Angeles12:20 → 12:4711:130 min11:1348 min28 Oct
Chicago14:20 → 14:4711:100 min11:1048 min28 Oct
Jersey City15:20 → 15:4711:160 min11:1648 min28 Oct
Port of Spain16:20 → 16:4711:260 min11:2648 min28 Oct
London20:20 → 20:4711:200 min11:2048 min28 Oct
Durban22:20 → 22:4711:160 min11:1648 min28 Oct
Dubai00:20 → 00:4711:390 min11:3848 min28 Oct
Delhi01:50 → 02:1711:410 min11:4148 min28 Oct
Kolkata01:50 → 02:1710:560 min10:5648 min28 Oct
Singapore03:50 → 04:1711:550 min11:5448 min28 Oct
Sydney06:20 → 06:4711:150 min11:1548 min28 Oct
Suva08:20 → 08:4711:260 min11:2648 min28 Oct
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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