Ruling · Sūrya Ṣaṣṭhī (Chhath) · 1971

Monday 25 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 577 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 Monday 25 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 26 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 01:19 on Mon 25 Oct to 02:01 on Tue 26 Oct.

    1971-10-24T17:18:44Z → 1971-10-25T18:00:43Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 25th, 11:38–12:26 on the 26th.

    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 25th and 0 of 48 on the 26th.

    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 34636 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 1971: Monday 25 October.

    confidence: determinate

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 1971 falls on Monday 25 October. Ṣaṣṭhī runs from 01:19 on Mon 25 Oct to 02:01 on Tue 26 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1971/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 25 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 25 Oct
compat-drikpanchangComparison profileMon 25 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 24thCoveredMadhyāhna 25thCoveredRuled
Los Angeles10:19 → 11:0112:1348 min12:130 min24 Oct
Chicago12:19 → 13:0112:1140 min12:1048 min25 Oct
Jersey City13:19 → 14:0112:160 min12:1648 min25 Oct
Port of Spain13:19 → 14:0111:260 min11:2648 min25 Oct
London18:19 → 19:0112:200 min12:2048 min25 Oct
Durban19:19 → 20:0111:160 min11:1648 min25 Oct
Dubai21:19 → 22:0111:390 min11:3948 min25 Oct
Delhi22:49 → 23:3111:410 min11:4148 min25 Oct
Kolkata22:49 → 23:3110:570 min10:5748 min25 Oct
Singapore00:49 → 01:3111:550 min11:5548 min25 Oct
Sydney03:19 → 04:0111:160 min11:1648 min25 Oct
Suva05:19 → 06:0111:270 min11:2748 min25 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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