Ruling · Candra Ṣaṣṭhī · 1978

Friday 22 September

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 71 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 Thursday 21 September

Ṣaṣṭhī does not hold at moonrise. Not taken.

20:22 moonrise
Ṣaṣṭhī begins 21:32:15
19:1019:3419:5820:2220:4621:1021:34

Absent at moonrise

Moonrise of Friday 22 September

Taken. The only moonrise Ṣaṣṭhī holds at.

21:02 moonrise
19:5020:1420:3821:0221:2621:5022:14

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 21:32 on Thu 21 Sep to 22:31 on Fri 22 Sep.

    1978-09-21T13:32:16Z → 1978-09-22T14:30:46Z

  2. 02

    Kāla

    Moonrise is at 20:22 on the 21st and 21:02 on the 22nd.

    moonrise: disc centre, 31′

  3. 03

    Rule

    Ṣaṣṭhī must be current at moonrise. It is not on the 21st and is on the 22nd.

    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 4230 s

  5. 05

    Ruling

    Candra Ṣaṣṭhī, Daqing, 1978: Friday 22 September.

    confidence: determinate

Say it like this

In Daqing, Candra Ṣaṣṭhī 1978 falls on Friday 22 September. Ṣaṣṭhī runs from 21:32 on Thu 21 Sep to 22:31 on Fri 22 Sep and is current at moonrise that day.

ahargana.org/daqing/festivals/1978/chandra-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 22 Sep
Ahargaṇa, classicalDisc centre, no refractionFri 22 Sep
compat-drikpanchangComparison profileFri 22 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 21stCoveredMoonrise 22ndCoveredRuled
Los Angeles06:32 → 07:3122:28holds23:13no21 Sep
Chicago08:32 → 09:3122:07holds22:50no21 Sep
Jersey City09:32 → 10:3122:13holds22:57no21 Sep
Port of Spain09:32 → 10:3122:08holds22:56no21 Sep
London14:32 → 15:3121:42holds22:21no21 Sep
Durban15:32 → 16:3122:37holds23:30no21 Sep
Dubai17:32 → 18:3121:47holds22:32no21 Sep
Delhi19:02 → 20:0121:41holds22:26no21 Sep
Kolkata19:02 → 20:0121:04holds21:50no21 Sep
Singapore21:02 → 22:0122:26holds23:14no21 Sep
Sydney23:32 → 00:3122:25no23:20holds22 Sep
Suva01:32 → 02:3122:09no23:01holds22 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

About Ahargaṇa