Ruling · Sūrya Ṣaṣṭhī (Chhath) · 2099

Tuesday 17 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 35 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 Tuesday 17 November

Taken. The only midday Ṣaṣṭhī reaches.

madhyāhna begins 11:39  12:27 madhyāhna ends
10:5111:1511:3912:0312:2712:5113:15

48 of 48 minutes covered

Midday of Wednesday 18 November

Ṣaṣṭhī is absent from madhyāhna. Not taken.

madhyāhna begins 11:39  12:27 madhyāhna ends
Ṣaṣṭhī ends 11:04:22
10:5111:1511:3912:0312:2712:5113:15

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 10:35 on Tue 17 Nov to 11:04 on Wed 18 Nov.

    2099-11-17T02:34:41Z → 2099-11-18T03:04:22Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 17th, 11:39–12:27 on the 18th.

    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 17th and 0 of 48 on the 18th.

    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 2102 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 2099: Tuesday 17 November.

    confidence: determinate

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 2099 falls on Tuesday 17 November. Ṣaṣṭhī runs from 10:35 on Tue 17 Nov to 11:04 on Wed 18 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2099/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 17 Nov
Ahargaṇa, classicalDisc centre, no refractionTue 17 Nov
compat-drikpanchangComparison profileTue 17 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 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles18:35 → 19:0411:1448 min11:140 min17 Nov
Chicago20:35 → 21:0411:1248 min11:120 min17 Nov
Jersey City21:35 → 22:0411:1748 min11:180 min17 Nov
Port of Spain22:35 → 23:0411:2748 min11:280 min17 Nov
London02:35 → 03:0411:2248 min11:220 min17 Nov
Durban04:35 → 05:0411:1748 min11:180 min17 Nov
Dubai06:35 → 07:0411:4048 min11:400 min17 Nov
Delhi08:05 → 08:3411:4248 min11:420 min17 Nov
Kolkata08:05 → 08:3410:5848 min10:580 min17 Nov
Singapore10:35 → 11:0412:2648 min12:260 min17 Nov
Sydney13:35 → 14:0412:170 min12:1748 min18 Nov
Suva14:35 → 15:0411:280 min11:2848 min18 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

About Ahargaṇa