Ruling · Sūrya Ṣaṣṭhī (Chhath) · 2018

Tuesday 13 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 286 minutes.

Decide it for

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 13 November

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 Wednesday 14 November

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 04:21 on Tue 13 Nov to 06:52 on Wed 14 Nov.

    2018-11-12T20:21:05Z → 2018-11-13T22:52:26Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 13th, 11:38–12:26 on the 14th.

    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 13th and 0 of 48 on the 14th.

    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 17154 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 2018: Tuesday 13 November.

    confidence: determinate

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 2018 falls on Tuesday 13 November. Ṣaṣṭhī runs from 04:21 on Tue 13 Nov to 06:52 on Wed 14 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2018/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 13 Nov
Ahargaṇa, classicalDisc centre, no refractionTue 13 Nov
compat-drikpanchangComparison profileTue 13 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 12thCoveredMadhyāhna 13thCoveredRuled
Los Angeles12:21 → 14:5211:130 min11:1348 min13 Nov
Chicago14:21 → 16:5211:110 min11:1148 min13 Nov
Jersey City15:21 → 17:5211:160 min11:1648 min13 Nov
Port of Spain16:21 → 18:5211:260 min11:2648 min13 Nov
London20:21 → 22:5211:200 min11:2048 min13 Nov
Durban22:21 → 00:5211:160 min11:1648 min13 Nov
Dubai00:21 → 02:5211:390 min11:3948 min13 Nov
Delhi01:51 → 04:2211:410 min11:4148 min13 Nov
Kolkata01:51 → 04:2210:570 min10:5748 min13 Nov
Singapore04:21 → 06:5212:250 min12:2548 min13 Nov
Sydney07:21 → 09:5212:150 min12:1648 min13 Nov
Suva09:21 → 11:5212:260 min12:2748 min13 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