Ruling · Mahānavamī · 1985

Monday 21 October

Determinatein Luanda, under the Rashtriya Panchang method. Clear of every threshold by 155 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 21 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:28  12:16 madhyāhna ends
10:4011:0411:2811:5212:1612:4013:04

48 of 48 minutes covered

Midday of Tuesday 22 October

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:28  12:16 madhyāhna ends
10:4011:0411:2811:5212:1612:4013:04

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Navamī runs from 08:53 on Mon 21 Oct to 08:44 on Tue 22 Oct.

    1985-10-21T07:53:07Z → 1985-10-22T07:43:43Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:28–12:16 on the 21st, 11:28–12:16 on the 22nd.

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

  3. 03

    Rule

    Navamī must be present during madhyāhna. It covers 48 of 48 minutes on the 21st and 0 of 48 on the 22nd.

    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 9279 s

  5. 05

    Ruling

    Mahānavamī, Luanda, 1985: Monday 21 October.

    confidence: determinate

Say it like this

In Luanda, Mahānavamī 1985 falls on Monday 21 October. Navamī runs from 08:53 on Mon 21 Oct to 08:44 on Tue 22 Oct and covers all of madhyāhna that midday.

ahargana.org/luanda/festivals/1985/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 21 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 21 Oct
compat-drikpanchangComparison profileMon 21 Oct
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/mahanavami · ruleset 2026.3-draft

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

“S 9 Mahanavami (purvaviddha) (In Bengal it is observed as paraviddha covering one muhurta from sunrise).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104. The Bengal reading (paraviddha, one muhūrta from sunrise) is not applied.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceNavamīMadhyāhna 21stCoveredMadhyāhna 22ndCoveredRuled
Los Angeles00:53 → 00:4412:1348 min12:130 min21 Oct
Chicago02:53 → 02:4412:1148 min12:110 min21 Oct
Jersey City03:53 → 03:4412:1748 min12:160 min21 Oct
Port of Spain03:53 → 03:4411:2748 min11:260 min21 Oct
London08:53 → 08:4412:2148 min12:210 min21 Oct
Durban09:53 → 09:4411:1748 min11:170 min21 Oct
Dubai11:53 → 11:4411:3934 min11:395 min21 Oct
Delhi13:23 → 13:1411:420 min11:4148 min22 Oct
Kolkata13:23 → 13:1410:570 min10:5748 min22 Oct
Singapore15:53 → 15:4412:250 min12:2548 min22 Oct
Sydney17:53 → 17:4411:160 min11:1648 min22 Oct
Suva19:53 → 19:4411:270 min11:2748 min22 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
mahanavami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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