Ruling · Mahāṣṭamī (Durgāṣṭamī) · 2026

Sunday 18 October

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 56 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 Sunday 18 October

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:48  12:36 madhyāhna ends
11:0011:2411:4812:1212:3613:0013:24

48 of 48 minutes covered

Midday of Monday 19 October

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:48  12:36 madhyāhna ends
11:0011:2411:4812:1212:3613:0013:24

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 08:29 on Sun 18 Oct to 10:52 on Mon 19 Oct.

    2026-10-18T02:58:39Z → 2026-10-19T05:22:16Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:48–12:36 on the 18th, 11:48–12:36 on the 19th.

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

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 48 of 48 minutes on the 18th and 0 of 48 on the 19th.

    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: paraviddha → only-day · margin 3330 s

  5. 05

    Ruling

    Mahāṣṭamī, Ujjain, 2026: Sunday 18 October.

    confidence: determinate

Say it like this

In Ujjain, Mahāṣṭamī (Durga Ashtami) 2026 falls on Sunday 18 October. Aṣṭamī runs from 08:29 on Sun 18 Oct to 10:52 on Mon 19 Oct and covers all of madhyāhna that midday. Rashtriya Panchang recorded 19 October (Principal festivals, 2026-27).

ahargana.org/ujjain/festivals/2026/mahashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 18 Oct
Ahargaṇa, classicalDisc centre, no refractionSun 18 Oct
compat-drikpanchangComparison profileSun 18 Oct
Rashtriya PanchangPrincipal festivals, 2026-27Mon 19 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 18thCoveredMadhyāhna 19thCoveredRuled
Los Angeles19:59 → 22:2212:1448 min12:140 min18 Oct
Chicago21:59 → 00:2212:1148 min12:110 min18 Oct
Jersey City22:59 → 01:2212:1748 min12:170 min18 Oct
Port of Spain22:59 → 01:2211:2748 min11:270 min18 Oct
London03:59 → 06:2212:2148 min12:210 min18 Oct
Durban04:59 → 07:2211:1748 min11:170 min18 Oct
Dubai06:59 → 09:2211:4048 min11:400 min18 Oct
Delhi08:29 → 10:5211:4248 min11:420 min18 Oct
Kolkata08:29 → 10:5210:5848 min10:570 min18 Oct
Singapore10:59 → 13:2212:2648 min12:2648 min19 Oct
Sydney13:59 → 16:2212:170 min12:1748 min19 Oct
Suva14:59 → 17:2211:280 min11:2748 min19 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