Ruling · Skanda Ṣaṣṭhī · 2091

Saturday 15 December

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 17 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 Saturday 15 December

Taken. Both middays qualify; the rule takes the first.

madhyāhna begins 11:11  11:59 madhyāhna ends
Ṣaṣṭhī begins 11:27:51
10:2310:4711:1111:3511:5912:2312:47

31 of 48 minutes covered, the last 31

Midday of Sunday 16 December

Qualifies with 29 of 48 minutes. Not taken.

madhyāhna begins 11:12  12:00 madhyāhna ends
Ṣaṣṭhī ends 11:41:02
10:2410:4811:1211:3612:0012:2412:48

29 of 48 minutes covered, the first 29

Ṣaṣṭhī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Ṣaṣṭhī runs from 11:28 on Sat 15 Dec to 11:41 on Sun 16 Dec.

    2091-12-15T03:27:51Z → 2091-12-16T03:41:02Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:11–11:59 on the 15th, 11:12–12:00 on the 16th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Ṣaṣṭhī must be present during madhyāhna. It covers 31 of 48 minutes on the 15th and 29 of 48 on the 16th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Both middays qualify. Pūrvaviddhā: the first is taken.

    priority: purvaviddha → purvaviddha · margin 1001 s

  5. 05

    Ruling

    Skanda Ṣaṣṭhī, Daqing, 2091: Saturday 15 December.

    confidence: determinate

Say it like this

In Daqing, Skanda Ṣaṣṭhī 2091 falls on Saturday 15 December. Ṣaṣṭhī runs from 11:28 on Sat 15 Dec to 11:41 on Sun 16 Dec and covers 31 of 48 minutes of madhyāhna that midday. It also reaches the next midday for 29 minutes; by the rule the first midday is taken.

ahargana.org/daqing/festivals/2091/skanda-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 15 Dec
Ahargaṇa, classicalDisc centre, no refractionSat 15 Dec
compat-drikpanchangComparison profileSat 15 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 16thCoveredRuled
Los Angeles19:28 → 19:4111:2448 min11:250 min15 Dec
Chicago21:28 → 21:4111:2248 min11:230 min15 Dec
Jersey City22:28 → 22:4111:2848 min11:280 min15 Dec
Port of Spain23:28 → 23:4111:3848 min11:380 min15 Dec
London03:28 → 03:4111:3248 min11:320 min15 Dec
Durban05:28 → 05:4111:2748 min11:280 min15 Dec
Dubai07:28 → 07:4111:5048 min11:510 min15 Dec
Delhi08:58 → 09:1111:5248 min11:530 min15 Dec
Kolkata08:58 → 09:1111:0848 min11:080 min15 Dec
Singapore11:28 → 11:4112:3648 min12:360 min15 Dec
Sydney14:28 → 14:4112:260 min12:2748 min16 Dec
Suva15:28 → 15:4111:370 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

About Ahargaṇa