Ruling · Mitra Saptamī · 1921

Tuesday 6 December

Determinatein Luanda, under the Rashtriya Panchang method. Clear of every threshold by 601 minutes.

Decide it for

LuandaDelhiKolkataSingaporeSydneyJersey City

8°50′ S 13°14′ E · Africa/Luanda · GeoNames 2240449

The two middays

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

Midday of Monday 5 December

Saptamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:34  12:22 madhyāhna ends
10:4611:1011:3411:5812:2212:4613:10

0 of 48 minutes covered

Midday of Tuesday 6 December

Taken. The only midday Saptamī reaches.

madhyāhna begins 11:34  12:22 madhyāhna ends
10:4611:1011:3411:5812:2212:4613:10

48 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Saptamī runs from 22:22 on Mon 5 Dec to 01:01 on Wed 7 Dec.

    1921-12-05T21:22:24Z → 1921-12-07T00:01:18Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:34–12:22 on the 5th, 11:34–12:22 on the 6th.

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

  3. 03

    Rule

    Saptamī must be present during madhyāhna. It covers 0 of 48 minutes on the 5th and 48 of 48 on the 6th.

    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 36044 s

  5. 05

    Ruling

    Mitra Saptamī, Luanda, 1921: Tuesday 6 December.

    confidence: determinate

Say it like this

In Luanda, Mitra Saptamī 1921 falls on Tuesday 6 December. Saptamī runs from 22:22 on Mon 5 Dec to 01:01 on Wed 7 Dec and covers all of madhyāhna that midday.

ahargana.org/luanda/festivals/1921/mitra-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 6 Dec
Ahargaṇa, classicalDisc centre, no refractionTue 6 Dec
compat-drikpanchangComparison profileTue 6 Dec
No institution has a recorded ruling for Luanda.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/mitra-saptami · ruleset 2026.3-draft

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

“S 7 Mitra saptami (purvaviddha).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceSaptamīMadhyāhna 5thCoveredMadhyāhna 7thCoveredRuled
Los Angeles13:22 → 16:0111:200 min11:200 min6 Dec
Chicago15:22 → 18:0111:170 min11:180 min6 Dec
Jersey City16:22 → 19:0111:230 min11:240 min6 Dec
Port of Spain17:22 → 20:0111:330 min11:340 min6 Dec
London21:22 → 00:0111:270 min11:280 min6 Dec
Durban23:22 → 02:0111:230 min11:230 min6 Dec
Dubai01:22 → 04:0111:450 min11:460 min6 Dec
Delhi02:52 → 05:3111:480 min11:480 min6 Dec
Kolkata02:52 → 05:3111:030 min11:040 min6 Dec
Singapore04:22 → 07:0111:310 min11:320 min6 Dec
Sydney07:22 → 10:0111:220 min11:230 min6 Dec
Suva09:22 → 12:0111:330 min11:3428 min6 Dec
Profile · tradition
pac-rp@2026.1 · smarta
Rule
mitra-saptami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa