Ruling · Mahāṣṭamī (Durgāṣṭamī) · 2028

Monday 25 September

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 295 minutes.

Decide it for

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 Monday 25 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:54  12:42 madhyāhna ends
11:0611:3011:5412:1812:4213:0613:30

48 of 48 minutes covered

Midday of Tuesday 26 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:54  12:42 madhyāhna ends
11:0611:3011:5412:1812:4213:0613:30

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 06:33 on Mon 25 Sep to 06:59 on Tue 26 Sep.

    2028-09-25T01:03:08Z → 2028-09-26T01:28:57Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 25th, 11:54–12:42 on the 26th.

    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 25th and 0 of 48 on the 26th.

    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 17700 s

  5. 05

    Ruling

    Mahāṣṭamī, Ujjain, 2028: Monday 25 September.

    confidence: determinate

Say it like this

In Ujjain, Mahāṣṭamī (Durga Ashtami) 2028 falls on Monday 25 September. Aṣṭamī runs from 06:33 on Mon 25 Sep to 06:59 on Tue 26 Sep and covers all of madhyāhna that midday.

ahargana.org/ujjain/festivals/2028/mahashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 25 Sep
Ahargaṇa, classicalDisc centre, no refractionMon 25 Sep
compat-drikpanchangComparison profileMon 25 Sep
No institution has a recorded ruling for Ujjain.

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 25thCoveredMadhyāhna 26thCoveredRuled
Los Angeles18:03 → 18:2912:2048 min12:200 min25 Sep
Chicago20:03 → 20:2912:1848 min12:170 min25 Sep
Jersey City21:03 → 21:2912:2348 min12:230 min25 Sep
Port of Spain21:03 → 21:2911:3348 min11:330 min25 Sep
London02:03 → 02:2912:2848 min12:270 min25 Sep
Durban03:03 → 03:2911:2448 min11:230 min25 Sep
Dubai05:03 → 05:2911:4648 min11:460 min25 Sep
Delhi06:33 → 06:5911:4848 min11:480 min25 Sep
Kolkata06:33 → 06:5911:0448 min11:040 min25 Sep
Singapore09:03 → 09:2912:3248 min12:320 min25 Sep
Sydney11:03 → 11:2911:2348 min11:236 min26 Sep
Suva13:03 → 13:2911:340 min11:3448 min26 Sep
Profile · tradition
pac-rp@2026.1 · smarta
Rule
mahashtami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s