Ruling · Rādhāṣṭamī · 2069

Monday 23 September

Determinatein Phoenix, under the Rashtriya Panchang method. Clear of every threshold by 471 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 Sunday 22 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:57  12:45 madhyāhna ends
11:0911:3311:5712:2112:4513:0913:33

0 of 48 minutes covered

Midday of Monday 23 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:56  12:44 madhyāhna ends
11:0811:3211:5612:2012:4413:0813:32

48 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 20:36 on Sun 22 Sep to 22:02 on Mon 23 Sep.

    2069-09-23T03:35:59Z → 2069-09-24T05:01:36Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:57–12:45 on the 22nd, 11:56–12:44 on the 23rd.

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

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 0 of 48 minutes on the 22nd and 48 of 48 on the 23rd.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 28281 s

  5. 05

    Ruling

    Rādhāṣṭamī, Phoenix, 2069: Monday 23 September.

    confidence: determinate

Say it like this

In Phoenix, Rādhāṣṭamī 2069 falls on Monday 23 September. Aṣṭamī runs from 20:36 on Sun 22 Sep to 22:02 on Mon 23 Sep and covers all of madhyāhna that midday.

ahargana.org/phoenix/festivals/2069/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 23 Sep
Ahargaṇa, classicalDisc centre, no refractionMon 23 Sep
compat-drikpanchangComparison profileMon 23 Sep
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/radhashtami · ruleset 2026.3-draft

Month
Bhādrapada, amānta
Pakṣa · aṅga
Śukla · Aṣṭamī
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 103

“S 8 Durvastami (purvaviddha — S 8 of saura Bhadra except Bengal), Mahalaksmi vratarambha, Radhastami (madhyahna vyapini)” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceAṣṭamīMadhyāhna 23rdCoveredMadhyāhna 24thCoveredRuled
Los Angeles20:36 → 22:0212:2148 min12:210 min23 Sep
Chicago22:36 → 00:0212:1948 min12:180 min23 Sep
Jersey City23:36 → 01:0212:2448 min12:240 min23 Sep
Port of Spain23:36 → 01:0211:3448 min11:340 min23 Sep
London04:36 → 06:0212:2848 min12:280 min23 Sep
Durban05:36 → 07:0211:2448 min11:240 min23 Sep
Dubai07:36 → 09:0211:4748 min11:470 min23 Sep
Delhi09:06 → 10:3211:4948 min11:490 min23 Sep
Kolkata09:06 → 10:3211:0548 min11:040 min23 Sep
Singapore11:36 → 13:0212:3348 min12:3329 min23 Sep
Sydney13:36 → 15:0211:240 min11:2448 min24 Sep
Suva15:36 → 17:0211:350 min11:3548 min24 Sep
Profile · tradition
pac-rp@2026.1 · smarta
Rule
radhashtami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa