Ruling · Mahāṣṭamī (Durga Ashtami) · 1921

Saturday 8 October

Determinatein Phoenix, under the Rashtriya Panchang method. Clear of every threshold by 579 minutes.

Decide it for

33°27′ N 112°04′ W · America/Phoenix · GeoNames 5308655

The two middays

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

Midday of Saturday 8 October

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:52  12:40 madhyāhna ends
11:0411:2811:5212:1612:4013:0413:28

48 of 48 minutes covered

Midday of Sunday 9 October

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:51  12:39 madhyāhna ends
11:0311:2711:5112:1512:3913:0313:27

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 00:17 on Sat 8 Oct to 02:13 on Sun 9 Oct.

    1921-10-08T07:17:15Z → 1921-10-09T09:12:48Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:52–12:40 on the 8th, 11:51–12:39 on the 9th.

    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 8th and 0 of 48 on the 9th.

    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 34715 s

  5. 05

    Ruling

    Mahāṣṭamī, Phoenix, 1921: Saturday 8 October.

    confidence: determinate

Say it like this

In Phoenix, Mahāṣṭamī (Durga Ashtami) 1921 falls on Saturday 8 October. Aṣṭamī runs from 00:17 on Sat 8 Oct to 02:13 on Sun 9 Oct and covers all of madhyāhna that midday.

ahargana.org/phoenix/festivals/1921/mahashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 8 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 8 Oct
compat-drikpanchangComparison profileSat 8 Oct
No institution has a recorded ruling for Phoenix.

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 8thCoveredMadhyāhna 9thCoveredRuled
Los Angeles23:17 → 01:1311:1648 min11:160 min8 Oct
Chicago02:17 → 04:1312:1448 min12:140 min8 Oct
Jersey City02:17 → 04:1311:2048 min11:190 min8 Oct
Port of Spain03:17 → 05:1311:3048 min11:290 min8 Oct
London07:17 → 09:1311:2448 min11:230 min8 Oct
Durban09:17 → 11:1311:2048 min11:200 min8 Oct
Dubai11:17 → 13:1311:4248 min11:4248 min9 Oct
Delhi12:47 → 14:4311:450 min11:4448 min9 Oct
Kolkata12:47 → 14:4311:000 min11:0048 min9 Oct
Singapore14:17 → 16:1311:280 min11:2848 min9 Oct
Sydney17:17 → 19:1311:190 min11:1948 min9 Oct
Suva19:17 → 21:1311:300 min11:3048 min9 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

About Ahargaṇa