Ruling · Durgā Navamī · 2020

Sunday 22 November

Determinatein Chicago, under the Rashtriya Panchang method. Clear of every threshold by 9 min 03 s.

Decide it for

41°51′ N 87°39′ W · America/Chicago · GeoNames 4887398

The two middays

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

Midday of Sunday 22 November

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

madhyāhna begins 11:13  12:01 madhyāhna ends
Navamī begins 11:21:46
10:2510:4911:1311:3712:0112:2512:49

39 of 48 minutes covered, the last 39

Midday of Monday 23 November

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:13  12:01 madhyāhna ends
10:2510:4911:1311:3712:0112:2512:49

48 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 11:22 on Sun 22 Nov to 13:03 on Mon 23 Nov.

    2020-11-22T17:21:47Z → 2020-11-23T19:02:48Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:13–12:01 on the 22nd, 11:13–12:01 on the 23rd.

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

  3. 03

    Rule

    Navamī must be present during madhyāhna. It covers 39 of 48 minutes on the 22nd and 48 of 48 on the 23rd.

    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 543 s

  5. 05

    Ruling

    Durgā Navamī, Chicago, 2020: Sunday 22 November.

    confidence: determinate

Say it like this

In Chicago, Durgā Navamī 2020 falls on Sunday 22 November. Navamī runs from 11:22 on Sun 22 Nov to 13:03 on Mon 23 Nov and covers 39 of 48 minutes of madhyāhna that midday. It also reaches the next midday for 48 minutes; by the rule the first midday is taken.

ahargana.org/chicago/festivals/2020/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 22 Nov
Ahargaṇa, classicalDisc centre, no refractionSun 22 Nov
compat-drikpanchangComparison profileSun 22 Nov
No institution has a recorded ruling for Chicago.

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

The rule, as data

/rules/durga-navami · ruleset 2026.3-draft

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

“S 9 Aksaya navami (purvahnavyapini), Jagaddhatri puja (Bengal), (udayavyapini one muhurta), Anla navami (Orissa), Durga navami (purvaviddha), Gauri vrata.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceNavamīMadhyāhna 22ndCoveredMadhyāhna 23rdCoveredRuled
Los Angeles09:22 → 11:0311:1548 min11:150 min22 Nov
Chicago11:22 → 13:0311:1339 min11:1348 min22 Nov
Jersey City12:22 → 14:0311:180 min11:1948 min23 Nov
Port of Spain13:22 → 15:0311:280 min11:2948 min23 Nov
London17:22 → 19:0311:230 min11:2348 min23 Nov
Durban19:22 → 21:0311:180 min11:1948 min23 Nov
Dubai21:22 → 23:0311:410 min11:4148 min23 Nov
Delhi22:52 → 00:3311:430 min11:4348 min23 Nov
Kolkata22:52 → 00:3310:590 min10:5948 min23 Nov
Singapore01:22 → 03:0312:270 min12:2748 min23 Nov
Sydney04:22 → 06:0312:170 min12:1848 min23 Nov
Suva05:22 → 07:0311:280 min11:2948 min23 Nov
Profile · tradition
pac-rp@2026.1 · smarta
Rule
durga-navami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa