Ruling · Sūrya Ṣaṣṭhī (Chhath) · 2011

Tuesday 1 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 11 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 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 Tuesday 1 November

Taken. The only midday Ṣaṣṭhī reaches.

madhyāhna begins 11:38  12:26 madhyāhna ends
Ṣaṣṭhī ends 12:36:02
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 13:34 on Mon 31 Oct to 12:36 on Tue 1 Nov.

    2011-10-31T05:33:31Z → 2011-11-01T04:36:02Z

  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 631 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 2011: Tuesday 1 November.

    confidence: determinate

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 2011 falls on Tuesday 1 November. Ṣaṣṭhī runs from 13:34 on Mon 31 Oct to 12:36 on Tue 1 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2011/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 1 Nov
Ahargaṇa, classicalDisc centre, no refractionTue 1 Nov
compat-drikpanchangComparison profileTue 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 Angeles22:34 → 21:3612:1248 min12:120 min31 Oct
Chicago00:34 → 23:3612:1048 min12:100 min31 Oct
Jersey City01:34 → 00:3612:1648 min12:160 min31 Oct
Port of Spain01:34 → 00:3611:2648 min11:260 min31 Oct
London05:34 → 04:3611:2048 min11:200 min31 Oct
Durban07:34 → 06:3611:1648 min11:160 min31 Oct
Dubai09:34 → 08:3611:3848 min11:380 min31 Oct
Delhi11:04 → 10:0611:4148 min11:410 min31 Oct
Kolkata11:04 → 10:0610:5641 min10:560 min31 Oct
Singapore13:34 → 12:3612:240 min12:2412 min1 Nov
Sydney16:34 → 15:3612:150 min12:1548 min1 Nov
Suva18:34 → 17:3612:260 min12:2648 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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