Ruling · Candra Ṣaṣṭhī · 2080

Friday 4 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 653 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 Friday 4 October

Taken. The only moonrise Ṣaṣṭhī holds at.

19:37 moonrise
18:2518:4919:1319:3720:0120:2520:49

Holds at moonrise

Moonrise of Saturday 5 October

Ṣaṣṭhī does not hold at moonrise. Not taken.

20:33 moonrise
19:2119:4520:0920:3320:5721:2121:45

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 08:43 on Fri 4 Oct to 07:17 on Sat 5 Oct.

    2080-10-04T00:43:12Z → 2080-10-04T23:16:35Z

  2. 02

    Kāla

    Moonrise is at 19:37 on the 4th and 20:33 on the 5th.

    moonrise: disc centre, 31′

  3. 03

    Rule

    Ṣaṣṭhī must be current at moonrise. It is on the 4th and is not on the 5th.

    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 39202 s

  5. 05

    Ruling

    Candra Ṣaṣṭhī, Daqing, 2080: Friday 4 October.

    confidence: determinate

Say it like this

In Daqing, Candra Ṣaṣṭhī 2080 falls on Friday 4 October. Ṣaṣṭhī runs from 08:43 on Fri 4 Oct to 07:17 on Sat 5 Oct and is current at moonrise that day.

ahargana.org/daqing/festivals/2080/chandra-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 4 Oct
Ahargaṇa, classicalDisc centre, no refractionFri 4 Oct
compat-drikpanchangComparison profileFri 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 4thCoveredMoonrise 5thCoveredRuled
Los Angeles17:43 → 16:1722:22no23:26no3 Oct
Chicago19:43 → 18:1721:43no22:47no3 Oct
Jersey City20:43 → 19:1721:51no22:55no3 Oct
Port of Spain20:43 → 19:1722:30no23:33no3 Oct
London01:43 → 00:1720:43holds21:43no4 Oct
Durban02:43 → 01:1723:45holds00:47no4 Oct
Dubai04:43 → 03:1721:47holds22:48no4 Oct
Delhi06:13 → 04:4721:36holds22:36no4 Oct
Kolkata06:13 → 04:4721:06holds22:07no4 Oct
Singapore08:43 → 07:1723:22holds00:24no4 Oct
Sydney10:43 → 09:1723:36holds00:40no4 Oct
Suva12:43 → 11:1722:56holds23:59no4 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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