Ruling · Mahānavamī · 2024

Friday 11 October

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 18 minutes.

Decide it for

UjjainDelhiKolkataSingaporeSydneyJersey City

23°11′ N 75°47′ E · Asia/Kolkata · GeoNames 1253914

The two middays

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

Midday of Friday 11 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:49  12:37 madhyāhna ends
Navamī begins 12:07:13
11:0111:2511:4912:1312:3713:0113:25

30 of 48 minutes covered, the last 30

Midday of Saturday 12 October

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:49  12:37 madhyāhna ends
11:0111:2511:4912:1312:3713:0113:25

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 12:07 on Fri 11 Oct to 10:59 on Sat 12 Oct.

    2024-10-11T06:37:14Z → 2024-10-12T05:29:01Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:49–12:37 on the 11th, 11:49–12:37 on the 12th.

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

  3. 03

    Rule

    Navamī must be present during madhyāhna. It covers 30 of 48 minutes on the 11th and 0 of 48 on the 12th.

    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 1070 s

  5. 05

    Ruling

    Mahānavamī, Ujjain, 2024: Friday 11 October.

    confidence: determinate

Say it like this

In Ujjain, Mahānavamī 2024 falls on Friday 11 October. Navamī runs from 12:07 on Fri 11 Oct to 10:59 on Sat 12 Oct and covers 30 of 48 minutes of madhyāhna that midday.

ahargana.org/ujjain/festivals/2024/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 11 Oct
Ahargaṇa, classicalDisc centre, no refractionFri 11 Oct
compat-drikpanchangComparison profileFri 11 Oct
Rashtriya PanchangPrincipal festivals, 2024-25Fri 11 Oct

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 11thCoveredMadhyāhna 12thCoveredRuled
Los Angeles23:37 → 22:2912:1548 min12:150 min11 Oct
Chicago01:37 → 00:2912:1348 min12:130 min11 Oct
Jersey City02:37 → 01:2912:1948 min12:180 min11 Oct
Port of Spain02:37 → 01:2911:2948 min11:280 min11 Oct
London07:37 → 06:2912:2348 min12:220 min11 Oct
Durban08:37 → 07:2911:1948 min11:180 min11 Oct
Dubai10:37 → 09:2911:4148 min11:410 min11 Oct
Delhi12:07 → 10:5911:4424 min11:430 min11 Oct
Kolkata12:07 → 10:5910:590 min10:590 min12 Oct
Singapore14:37 → 13:2912:270 min12:2748 min12 Oct
Sydney17:37 → 16:2912:180 min12:1848 min12 Oct
Suva18:37 → 17:2911:290 min11:2948 min12 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