Ruling · Mahāṣṭamī (Durgāṣṭamī) · 2024

Friday 11 October

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 5 min 24 s.

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 Thursday 10 October

Qualifies with 5 of 48 minutes. Not taken.

madhyāhna begins 11:50  12:38 madhyāhna ends
Aṣṭamī begins 12:32:15
11:0211:2611:5012:1412:3813:0213:26

5 of 48 minutes covered, the last 5

Midday of Friday 11 October

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

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

18 of 48 minutes covered, the first 18

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

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 12:32 on Thu 10 Oct to 12:07 on Fri 11 Oct.

    2024-10-10T07:02:15Z → 2024-10-11T06:37:14Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:50–12:38 on the 10th, 11:49–12:37 on the 11th.

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

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 5 of 48 minutes on the 10th and 18 of 48 on the 11th.

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

  4. 04

    Tie-break

    Both middays qualify. Paraviddhā: the second is taken.

    priority: paraviddha → paraviddha · margin 324 s

  5. 05

    Ruling

    Mahāṣṭamī, Ujjain, 2024: Friday 11 October.

    confidence: determinate

Say it like this

In Ujjain, Mahāṣṭamī (Durga Ashtami) 2024 falls on Friday 11 October. Aṣṭamī runs from 12:32 on Thu 10 Oct to 12:07 on Fri 11 Oct and covers 18 of 48 minutes of madhyāhna that midday. It also reaches the previous midday for 5 minutes; by the rule the second midday is taken.

ahargana.org/ujjain/festivals/2024/mahashtami · 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/mahashtami · ruleset 2026.3-draft

Month
Āśvina, amānta
Pakṣa · aṅga
Śukla · Aṣṭamī
Kāla
Madhyāhna
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 104

“S 8 Mahastami (paraviddha)” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceAṣṭamīMadhyāhna 10thCoveredMadhyāhna 11thCoveredRuled
Los Angeles00:02 → 23:3712:1648 min12:150 min10 Oct
Chicago02:02 → 01:3712:1348 min12:130 min10 Oct
Jersey City03:02 → 02:3712:1948 min12:190 min10 Oct
Port of Spain03:02 → 02:3711:2948 min11:290 min10 Oct
London08:02 → 07:3712:2348 min12:230 min10 Oct
Durban09:02 → 08:3711:1948 min11:190 min10 Oct
Dubai11:02 → 10:3711:4148 min11:410 min10 Oct
Delhi12:32 → 12:0711:440 min11:4424 min11 Oct
Kolkata12:32 → 12:0710:590 min10:5948 min11 Oct
Singapore15:02 → 14:3712:280 min12:2748 min11 Oct
Sydney18:02 → 17:3712:180 min12:1848 min11 Oct
Suva19:02 → 18:3711:290 min11:2948 min11 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
mahashtami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s