Ruling · Sūrya Ṣaṣṭhī (Chhath) · 2026

Sunday 15 November

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 586 minutes.

Decide it for

23°11′ N 75°47′ E · Asia/Kolkata · GeoNames 1253914

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Sunday 15 November

Taken. The only midday Ṣaṣṭhī reaches.

madhyāhna begins 11:47  12:35 madhyāhna ends
10:5911:2311:4712:1112:3512:5913:23

48 of 48 minutes covered

Midday of Monday 16 November

Ṣaṣṭhī is absent from madhyāhna. Not taken.

madhyāhna begins 11:48  12:36 madhyāhna ends
11:0011:2411:4812:1212:3613:0013:24

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 23:24 on Sat 14 Nov to 02:02 on Mon 16 Nov.

    2026-11-14T17:54:29Z → 2026-11-15T20:31:40Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 on the 15th, 11:48–12:36 on the 16th.

    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 15th and 0 of 48 on the 16th.

    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 35151 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Ujjain, 2026: Sunday 15 November.

    confidence: determinate

Say it like this

In Ujjain, Sūrya Ṣaṣṭhī (Chhath) 2026 falls on Sunday 15 November. Ṣaṣṭhī runs from 23:24 on Sat 14 Nov to 02:02 on Mon 16 Nov and covers all of madhyāhna that midday.

ahargana.org/ujjain/festivals/2026/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 15 Nov
Ahargaṇa, classicalDisc centre, no refractionSun 15 Nov
compat-drikpanchangComparison profileSun 15 Nov
Rashtriya PanchangPrincipal festivals, 2026-27Sun 15 Nov

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 14thCoveredMadhyāhna 15thCoveredRuled
Los Angeles09:54 → 12:3211:1348 min11:1348 min14 Nov
Chicago11:54 → 14:3211:114 min11:1148 min15 Nov
Jersey City12:54 → 15:3211:170 min11:1748 min15 Nov
Port of Spain13:54 → 16:3211:260 min11:2748 min15 Nov
London17:54 → 20:3211:210 min11:2148 min15 Nov
Durban19:54 → 22:3211:160 min11:1748 min15 Nov
Dubai21:54 → 00:3211:390 min11:3948 min15 Nov
Delhi23:24 → 02:0211:410 min11:4148 min15 Nov
Kolkata23:24 → 02:0210:570 min10:5748 min15 Nov
Singapore01:54 → 04:3212:250 min12:2548 min15 Nov
Sydney04:54 → 07:3212:160 min12:1648 min15 Nov
Suva05:54 → 08:3211:270 min11:2748 min15 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