Ruling · Candra Ṣaṣṭhī · 1909

Monday 4 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 439 minutes.

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 3 October

Ṣaṣṭhī does not hold at moonrise. Not taken.

19:34 moonrise
18:2218:4619:1019:3419:5820:2220:46

Absent at moonrise

Moonrise of Monday 4 October

Taken. The only moonrise Ṣaṣṭhī holds at.

20:13 moonrise
19:0119:2519:4920:1320:3721:0121:25

Holds 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 05:00 on Mon 4 Oct to 03:31 on Tue 5 Oct.

    1909-10-03T21:00:23Z → 1909-10-04T19:31:21Z

  2. 02

    Kāla

    Moonrise is at 19:34 on the 3rd and 20:13 on the 4th.

    moonrise: disc centre, 31′

  3. 03

    Rule

    Ṣaṣṭhī must be current at moonrise. It is not on the 3rd and is on the 4th.

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

  4. 04

    Tie-break

    Only one moonrise qualifies. No tie-break is needed.

    priority: purvaviddha → only-day · margin 26320 s

  5. 05

    Ruling

    Candra Ṣaṣṭhī, Daqing, 1909: Monday 4 October.

    confidence: determinate

Say it like this

In Daqing, Candra Ṣaṣṭhī 1909 falls on Monday 4 October. Ṣaṣṭhī runs from 05:00 on Mon 4 Oct to 03:31 on Tue 5 Oct and is current at moonrise that day.

ahargana.org/daqing/festivals/1909/chandra-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 4 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 4 Oct
compat-drikpanchangComparison profileMon 4 Oct
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 3rdCoveredMoonrise 4thCoveredRuled
Los Angeles13:00 → 11:3120:52holds21:42no3 Oct
Chicago15:00 → 13:3120:23holds21:10no3 Oct
Jersey City16:00 → 14:3120:31holds21:18no3 Oct
Port of Spain17:00 → 15:3121:47holds22:42no3 Oct
London21:00 → 19:3119:46no20:24no3 Oct
Durban23:00 → 21:3122:37no23:42no3 Oct
Dubai00:41 → 23:1220:57no21:47holds4 Oct
Delhi02:30 → 01:0121:08no21:57holds4 Oct
Kolkata02:30 → 01:0120:34no21:25holds4 Oct
Singapore04:00 → 02:3121:36no22:33holds4 Oct
Sydney07:00 → 05:3122:23no23:31holds4 Oct
Suva08:55 → 07:2621:52no22:54holds4 Oct
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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