Ruling · Skanda Ṣaṣṭhī · 2012

Tuesday 18 December

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 541 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

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

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Tuesday 18 December

Taken. The only midday Ṣaṣṭhī reaches.

madhyāhna begins 11:13  12:01 madhyāhna ends
10:2510:4911:1311:3712:0112:2512:49

48 of 48 minutes covered

Midday of Wednesday 19 December

Ṣaṣṭhī is absent from madhyāhna. Not taken.

madhyāhna begins 11:13  12:01 madhyāhna ends
10:2510:4911:1311:3712:0112:2512:49

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 02:11 on Tue 18 Dec to 01:12 on Wed 19 Dec.

    2012-12-17T18:11:27Z → 2012-12-18T17:11:59Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:13–12:01 on the 18th, 11:13–12:01 on the 19th.

    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 18th and 0 of 48 on the 19th.

    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: purvaviddha → only-day · margin 32470 s

  5. 05

    Ruling

    Skanda Ṣaṣṭhī, Daqing, 2012: Tuesday 18 December.

    confidence: determinate

Say it like this

In Daqing, Skanda Ṣaṣṭhī 2012 falls on Tuesday 18 December. Ṣaṣṭhī runs from 02:11 on Tue 18 Dec to 01:12 on Wed 19 Dec and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2012/skanda-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 18 Dec
Ahargaṇa, classicalDisc centre, no refractionTue 18 Dec
compat-drikpanchangComparison profileTue 18 Dec
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/skanda-shashthi · ruleset 2026.3-draft

Month
Mārgaśīrṣa, amānta
Pakṣa · aṅga
Śukla · Ṣaṣṭhī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 104

“S 6 Campa sasthi (Maharashtra) (paraviddha). (Special when combined with naksatra Satabhisaj, yoga Vyatipata and Sunday), Skanda sasthi (purvaviddha), Guha sasthi” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceṢaṣṭhīMadhyāhna 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles10:11 → 09:1211:2548 min11:260 min17 Dec
Chicago12:11 → 11:1211:230 min11:240 min18 Dec
Jersey City13:11 → 12:1211:290 min11:2943 min18 Dec
Port of Spain14:11 → 13:1211:380 min11:3948 min18 Dec
London18:11 → 17:1211:330 min11:3348 min18 Dec
Durban20:11 → 19:1211:280 min11:2948 min18 Dec
Dubai22:11 → 21:1211:510 min11:5148 min18 Dec
Delhi23:41 → 22:4211:530 min11:5448 min18 Dec
Kolkata23:41 → 22:4211:090 min11:0948 min18 Dec
Singapore02:11 → 01:1212:370 min12:3748 min18 Dec
Sydney05:11 → 04:1212:270 min12:2848 min18 Dec
Suva07:11 → 06:1212:380 min12:3948 min18 Dec
Profile · tradition
pac-rp@2026.1 · smarta
Rule
skanda-shashthi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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