Ruling · Skanda Ṣaṣṭhī · 2001

Thursday 20 December

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 179 minutes.

Decide it for

TehranDelhiKolkataSingaporeSydneyJersey City

35°42′ N 51°25′ E · Asia/Tehran · GeoNames 112931

The two middays

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

Midday of Thursday 20 December

Taken. The only midday Ṣaṣṭhī reaches.

madhyāhna begins 11:38  12:26 madhyāhna ends
10:5011:1411:3812:0212:2612:5013:14

48 of 48 minutes covered

Midday of Friday 21 December

Ṣaṣṭhī is absent from madhyāhna. Not taken.

madhyāhna begins 11:38  12:26 madhyāhna ends
10:5011:1411:3812:0212:2612:5013:14

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 06:11 on Thu 20 Dec to 08:39 on Fri 21 Dec.

    2001-12-20T02:41:08Z → 2001-12-21T05:09:28Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 20th, 11:38–12:26 on the 21st.

    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 20th and 0 of 48 on the 21st.

    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 10735 s

  5. 05

    Ruling

    Skanda Ṣaṣṭhī, Tehran, 2001: Thursday 20 December.

    confidence: determinate

Say it like this

In Tehran, Skanda Ṣaṣṭhī 2001 falls on Thursday 20 December. Ṣaṣṭhī runs from 06:11 on Thu 20 Dec to 08:39 on Fri 21 Dec and covers all of madhyāhna that midday.

ahargana.org/tehran/festivals/2001/skanda-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 20 Dec
Ahargaṇa, classicalDisc centre, no refractionThu 20 Dec
compat-drikpanchangComparison profileThu 20 Dec
No institution has a recorded ruling for Tehran.

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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles18:41 → 21:0911:2748 min11:270 min20 Dec
Chicago20:41 → 23:0911:2448 min11:250 min20 Dec
Jersey City21:41 → 00:0911:3048 min11:310 min20 Dec
Port of Spain22:41 → 01:0911:4048 min11:400 min20 Dec
London02:41 → 05:0911:3448 min11:350 min20 Dec
Durban04:41 → 07:0911:3048 min11:300 min20 Dec
Dubai06:41 → 09:0911:5248 min11:530 min20 Dec
Delhi08:11 → 10:3911:5548 min11:550 min20 Dec
Kolkata08:11 → 10:3911:1048 min11:110 min20 Dec
Singapore10:41 → 13:0912:3848 min12:3931 min20 Dec
Sydney13:41 → 16:0912:290 min12:2948 min21 Dec
Suva14:41 → 17:0911:400 min11:4048 min21 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