Ruling · Rāsayātrā · 2028

Wednesday 1 November

Boundaryin Phoenix, under the Rashtriya Panchang method. A threshold is only 2 min 23 s away. Say “contested”.

Decide it for

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

The two nights

One ghaṭī is 24 minutes. Niśītha is 1 ghaṭikā either side of midnight.

Night of Tuesday 31 October

Pūrṇimā is absent from niśītha. Not taken.

niśītha begins 23:48  00:36 niśītha ends
Pūrṇimā begins 00:38:30
23:0023:2423:4800:1200:3601:0001:24

0 of 48 minutes covered

Night of Wednesday 1 November

Taken. The only night Pūrṇimā reaches.

niśītha begins 23:48  00:36 niśītha ends
23:0023:2423:4800:1200:3601:0001:24

48 of 48 minutes covered

Pūrṇimā presentNiśītha, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 00:39 on Wed 1 Nov to 02:17 on Thu 2 Nov.

    2028-11-01T07:38:31Z → 2028-11-02T09:17:22Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 23:48–00:36 on the 31st, 23:48–00:36 on the 1st.

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

  3. 03

    Rule

    Pūrṇimā must be present during niśītha. It covers 0 of 48 minutes on the 31st and 48 of 48 on the 1st.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

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

    priority: paraviddha → only-day · margin 143 s < 300 s

  5. 05

    Ruling

    Rāsayātrā, Phoenix, 2028: Wednesday 1 November.

    confidence: boundary (margin)

Say it like this

In Phoenix, Rāsayātrā 2028 falls on Wednesday 1 November. Pūrṇimā runs from 00:39 on Wed 1 Nov to 02:17 on Thu 2 Nov and covers all of niśītha that night. It is 2 min 23 s from a threshold: treat the date as contested.

ahargana.org/phoenix/festivals/2028/rasayatra · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 1 Nov
Ahargaṇa, classicalDisc centre, no refractionWed 1 Nov
compat-drikpanchangComparison profileWed 1 Nov
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/rasayatra · ruleset 2026.3-draft

Month
Kārtika, amānta
Pakṣa · aṅga
Śukla · Pūrṇimā
Kāla
Niśītha
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 104

“S 15 Rasayatra, (nisithavyapini, i.e. covering a period from 24 minutes before to 24 minutes after midnight. If occurs on two days or does not occur on any day, it is to be observed on the second day), Puskar Fair. Ratha yatra (Jain), Tripurotsava (evening), Kedara vrata (Orissa), Kartiki purnima.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePūrṇimāNiśītha 1stCoveredNiśītha 2ndCoveredRuled
Los Angeles00:39 → 02:1700:1348 min00:130 min1 Nov
Chicago02:39 → 04:1700:1148 min00:110 min1 Nov
Jersey City03:39 → 05:1700:1648 min00:160 min1 Nov
Port of Spain03:39 → 05:1723:2648 min23:260 min1 Nov
London07:39 → 09:1723:2148 min23:210 min1 Nov
Durban09:39 → 11:1723:1548 min23:150 min1 Nov
Dubai11:39 → 13:1723:3948 min23:380 min1 Nov
Delhi13:09 → 14:4723:4148 min23:410 min1 Nov
Kolkata13:09 → 14:4722:5648 min22:560 min1 Nov
Singapore15:39 → 17:1700:2448 min00:240 min1 Nov
Sydney18:39 → 20:1700:1548 min00:150 min1 Nov
Suva19:39 → 21:1723:2648 min23:260 min1 Nov
Profile · tradition
pac-rp@2026.1 · smarta
Rule
rasayatra@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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