Ruling · Candra Ṣaṣṭhī · 1953

Sunday 27 September

Boundaryin Daqing, under the Rashtriya Panchang method. Ṣaṣṭhī reaches moonrise on neither day and the rule does not say what then. Say “contested”.

Decide it for

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two moonrises

One ghaṭī is 24 minutes. The moonrise is read as disc centre, 31′.

Moonrise of Sunday 27 September

Taken. Ṣaṣṭhī reaches neither moonrise; this is the day it falls on.

19:24 moonrise
Ṣaṣṭhī begins 19:57:48
18:1218:3619:0019:2419:4820:1220:36

Absent at moonrise

Moonrise of Monday 28 September

Ṣaṣṭhī does not hold at moonrise. Not taken.

20:16 moonrise
19:0419:2819:5220:1620:4021:0421:28

Absent at moonrise

Ṣaṣṭhī presentMoonrise, the instant the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Ṣaṣṭhī runs from 19:58 on Sun 27 Sep to 18:29 on Mon 28 Sep.

    1953-09-27T11:57:48Z → 1953-09-28T10:29:25Z

  2. 02

    Kāla

    Moonrise is at 19:24 on the 27th and 20:16 on the 28th.

    moonrise: disc centre, 31′

  3. 03

    Rule

    Ṣaṣṭhī must be current at moonrise. It is not on the 27th and is not on the 28th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

  4. 04

    Tie-break

    Neither moonrise qualifies. The day the tithi falls on is taken.

    priority: purvaviddha → tithi-day · margin 2011 s

  5. 05

    Ruling

    Candra Ṣaṣṭhī, Daqing, 1953: Sunday 27 September.

    confidence: boundary (absent-unstated)

Say it like this

In Daqing, Candra Ṣaṣṭhī 1953 falls on Sunday 27 September. Ṣaṣṭhī runs from 19:58 on Sun 27 Sep to 18:29 on Mon 28 Sep, and is current at moonrise on neither day.

ahargana.org/daqing/festivals/1953/chandra-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 27 Sep
Ahargaṇa, classicalDisc centre, no refractionSun 27 Sep
compat-drikpanchangComparison profileSun 27 Sep
No institution has a recorded ruling for Daqing.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/chandra-shashthi · ruleset 2026.3-draft

Month
Bhādrapada, amānta
Pakṣa · aṅga
Kṛṣṇa · Ṣaṣṭhī
Kāla
Moonrise
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 103

“K 6 Candra sasthi (Sasthi current at moon-rise, if occurs on two successive days, it is to be observed on the first day).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceṢaṣṭhīMoonrise 27thCoveredMoonrise 28thCoveredRuled
Los Angeles03:58 → 02:2920:59holds21:57no27 Sep
Chicago05:58 → 04:2920:25holds21:22no27 Sep
Jersey City06:58 → 05:2920:33holds21:30no27 Sep
Port of Spain07:58 → 06:2922:01holds22:59no27 Sep
London12:58 → 11:2920:35holds21:28no27 Sep
Durban13:58 → 12:2923:05holds00:06no27 Sep
Dubai15:58 → 14:2921:23holds22:20no27 Sep
Delhi17:28 → 15:5921:13holds22:09no27 Sep
Kolkata17:28 → 15:5920:42holds21:39no27 Sep
Singapore19:28 → 17:5922:22holds23:21no27 Sep
Sydney21:58 → 20:2922:55holds23:58no27 Sep
Suva23:58 → 22:2922:21no23:22no27 Sep
Profile · tradition
pac-rp@2026.1 · smarta
Rule
chandra-shashthi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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