Ruling · Sūrya Ṣaṣṭhī (Chhath) · 2009

Saturday 24 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 133 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 Friday 23 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 Saturday 24 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

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

How it was decided

  1. 01

    Aṅga

    Ṣaṣṭhī runs from 14:39 on Fri 23 Oct to 16:49 on Sat 24 Oct.

    2009-10-23T06:38:46Z → 2009-10-24T08:49:08Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 23rd, 11:38–12:26 on the 24th.

    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 23rd and 48 of 48 on the 24th.

    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 7951 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 2009: Saturday 24 October.

    confidence: determinate

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 2009 falls on Saturday 24 October. Ṣaṣṭhī runs from 14:39 on Fri 23 Oct to 16:49 on Sat 24 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2009/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 24 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 24 Oct
compat-drikpanchangComparison profileSat 24 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 23rdCoveredMadhyāhna 24thCoveredRuled
Los Angeles23:39 → 01:4912:1348 min12:130 min23 Oct
Chicago01:39 → 03:4912:1148 min12:100 min23 Oct
Jersey City02:39 → 04:4912:1648 min12:160 min23 Oct
Port of Spain02:39 → 04:4911:2648 min11:260 min23 Oct
London07:39 → 09:4912:2048 min12:200 min23 Oct
Durban08:39 → 10:4911:1648 min11:160 min23 Oct
Dubai10:39 → 12:4911:3948 min11:3948 min23 Oct
Delhi12:09 → 14:1911:4120 min11:4148 min24 Oct
Kolkata12:09 → 14:1910:570 min10:5748 min24 Oct
Singapore14:39 → 16:4912:250 min12:2548 min24 Oct
Sydney17:39 → 19:4912:160 min12:1648 min24 Oct
Suva18:39 → 20:4911:270 min11:2748 min24 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

About Ahargaṇa