Ruling · Skanda Ṣaṣṭhī · 1920

Thursday 16 December

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 161 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 Thursday 16 December

Taken. The only midday Ṣaṣṭhī reaches.

madhyāhna begins 11:11  11:59 madhyāhna ends
10:2310:4711:1111:3511:5912:2312:47

48 of 48 minutes covered

Midday of Friday 17 December

Ṣaṣṭhī is absent from madhyāhna. Not taken.

madhyāhna begins 11:12  12:00 madhyāhna ends
10:2410:4811:1211:3612:0012:2412:48

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 06:26 on Thu 16 Dec to 08:31 on Fri 17 Dec.

    1920-12-15T22:26:10Z → 1920-12-17T00:31:24Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:11–11:59 on the 16th, 11:12–12:00 on the 17th.

    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 16th and 0 of 48 on the 17th.

    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 9634 s

  5. 05

    Ruling

    Skanda Ṣaṣṭhī, Daqing, 1920: Thursday 16 December.

    confidence: determinate

Say it like this

In Daqing, Skanda Ṣaṣṭhī 1920 falls on Thursday 16 December. Ṣaṣṭhī runs from 06:26 on Thu 16 Dec to 08:31 on Fri 17 Dec and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1920/skanda-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 16 Dec
Ahargaṇa, classicalDisc centre, no refractionThu 16 Dec
compat-drikpanchangComparison profileThu 16 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 15thCoveredMadhyāhna 17thCoveredRuled
Los Angeles14:26 → 16:3111:240 min11:250 min16 Dec
Chicago16:26 → 18:3111:220 min11:230 min16 Dec
Jersey City17:26 → 19:3111:280 min11:290 min16 Dec
Port of Spain18:26 → 20:3111:370 min11:380 min16 Dec
London22:26 → 00:3111:320 min11:330 min16 Dec
Durban00:26 → 02:3111:270 min11:280 min16 Dec
Dubai02:26 → 04:3111:500 min11:510 min16 Dec
Delhi03:56 → 06:0111:520 min11:530 min16 Dec
Kolkata03:56 → 06:0111:080 min11:090 min16 Dec
Singapore05:26 → 07:3111:360 min11:370 min16 Dec
Sydney08:26 → 10:3111:260 min11:270 min16 Dec
Suva10:26 → 12:3111:370 min11:3848 min16 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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