Ruling · Durgā Saptamī · 2018

Monday 15 October

Boundaryin Luanda, under the Rashtriya Panchang method. A threshold is only 2 min 46 s away. Say “contested”.

Decide it for

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

The two mornings

One ghaṭī is 24 minutes. The first muhūrta after sunrise is 1st of 15 day muhūrtas.

Morning of Monday 15 October

Taken. The only morning Saptamī reaches.

sunrise 05:44  06:34 one muhūrta on
04:5605:2005:4406:0806:3206:5607:2007:44

49 of 49 minutes covered

Morning of Tuesday 16 October

Saptamī holds for 3 of 49 minutes of the first muhūrta after sunrise, not all of it. Not taken.

sunrise 05:44  06:33 one muhūrta on
Saptamī ends 05:46:42
04:5605:2005:4406:0806:3206:5607:2007:44

3 of 49 minutes covered, the first 3

Saptamī presentThe first muhūrta after sunrise, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Saptamī runs from 03:35 on Mon 15 Oct to 05:47 on Tue 16 Oct.

    2018-10-15T02:35:01Z → 2018-10-16T04:46:42Z

  2. 02

    Kāla

    The first muhūrta after sunrise is 1st of 15 day muhūrtas: 05:44–06:34 on the 15th, 05:44–06:33 on the 16th.

    udaya-1: day-muhurta-1-1 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Saptamī must hold through the first muhūrta after sunrise. It covers 49 of 49 minutes on the 15th and 3 of 49 on the 16th.

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

  4. 04

    Tie-break

    Only one morning qualifies. No tie-break is needed.

    priority: paraviddha → only-day · margin 166 s < 300 s

  5. 05

    Ruling

    Durgā Saptamī, Luanda, 2018: Monday 15 October.

    confidence: boundary (margin)

Say it like this

In Luanda, Durgā Saptamī 2018 falls on Monday 15 October. Saptamī runs from 03:35 on Mon 15 Oct to 05:47 on Tue 16 Oct and covers all of the first muhūrta after sunrise that morning. It is 2 min 46 s from a threshold: treat the date as contested.

ahargana.org/luanda/festivals/2018/durga-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 15 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 15 Oct
compat-drikpanchangComparison profileMon 15 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/durga-saptami · ruleset 2026.3-draft

Month
Āśvina, amānta
Pakṣa · aṅga
Śukla · Saptamī
Kāla
The first muhūrta after sunrise
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 104

“S 7 Durga saptami (paraviddha) — covering one muhurta from sunrise” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceSaptamīSunrise 15thCoveredSunrise 16thCoveredRuled
Los Angeles19:35 → 21:4706:5845 min06:590 min15 Oct
Chicago21:35 → 23:4707:0344 min07:040 min15 Oct
Jersey City22:35 → 00:4707:0845 min07:090 min15 Oct
Port of Spain22:35 → 00:4705:5548 min05:550 min15 Oct
London03:35 → 05:4707:2543 min07:260 min15 Oct
Durban04:35 → 06:4705:1851 min05:1751 min16 Oct
Dubai06:35 → 08:4706:1728 min06:1846 min16 Oct
Delhi08:05 → 10:1706:220 min06:2346 min16 Oct
Kolkata08:05 → 10:1705:330 min05:3446 min16 Oct
Singapore10:35 → 12:4706:480 min06:4848 min16 Oct
Sydney13:35 → 15:4706:150 min06:1352 min16 Oct
Suva14:35 → 16:4705:380 min05:3750 min16 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
durga-saptami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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