Ruling · Mahāṣṭamī (Durga Ashtami) · 2012

Sunday 21 October

Determinatein Phoenix, under the Rashtriya Panchang method. Clear of every threshold by 153 minutes.

Decide it for

PhoenixDelhiKolkataSingaporeSydneyJersey City

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 Sunday 21 October

Taken. The only midday Aṣṭamī reaches.

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

48 of 48 minutes covered

Midday of Monday 22 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 09:16 on Sun 21 Oct to 07:56 on Mon 22 Oct.

    2012-10-21T16:15:55Z → 2012-10-22T14:56:01Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:49–12:37 on the 21st, 11:48–12:36 on the 22nd.

    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 21st and 0 of 48 on the 22nd.

    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 9161 s

  5. 05

    Ruling

    Mahāṣṭamī, Phoenix, 2012: Sunday 21 October.

    confidence: determinate

Say it like this

In Phoenix, Mahāṣṭamī (Durga Ashtami) 2012 falls on Sunday 21 October. Aṣṭamī runs from 09:16 on Sun 21 Oct to 07:56 on Mon 22 Oct and covers all of madhyāhna that midday.

ahargana.org/phoenix/festivals/2012/mahashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 21 Oct
Ahargaṇa, classicalDisc centre, no refractionSun 21 Oct
compat-drikpanchangComparison profileSun 21 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 21stCoveredMadhyāhna 22ndCoveredRuled
Los Angeles09:16 → 07:5612:1348 min12:130 min21 Oct
Chicago11:16 → 09:5612:1148 min12:110 min21 Oct
Jersey City12:16 → 10:5612:1748 min12:160 min21 Oct
Port of Spain12:16 → 10:5611:270 min11:260 min22 Oct
London17:16 → 15:5612:210 min12:2148 min22 Oct
Durban18:16 → 16:5611:170 min11:1748 min22 Oct
Dubai20:16 → 18:5611:390 min11:3948 min22 Oct
Delhi21:46 → 20:2611:410 min11:4148 min22 Oct
Kolkata21:46 → 20:2610:570 min10:5748 min22 Oct
Singapore00:16 → 22:5612:250 min12:2548 min22 Oct
Sydney03:16 → 01:5612:160 min12:1648 min22 Oct
Suva05:16 → 03:5612:270 min12:2748 min22 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