Ruling · Rāsayātrā · 2086

Wednesday 20 November

Boundaryin Riyadh, under the Rashtriya Panchang method. A threshold is only 1 min 40 s away. Say “contested”.

Decide it for

24°41′ N 46°43′ E · Asia/Riyadh · GeoNames 108410

The two nights

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

Night of Tuesday 19 November

Pūrṇimā is absent from niśītha. Not taken.

niśītha begins 23:15  00:03 niśītha ends
22:2722:5123:1523:3900:0300:2700:51

0 of 48 minutes covered

Night of Wednesday 20 November

Taken. Pūrṇimā reaches neither night; the rule takes the second day.

niśītha begins 23:15  00:03 niśītha ends
Pūrṇimā ends 23:13:34
22:2722:5123:1523:3900:0300:2700:51

0 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 02:27 on Wed 20 Nov to 23:14 on Wed 20 Nov.

    2086-11-19T23:27:11Z → 2086-11-20T20:13:34Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 23:15–00:03 on the 19th, 23:15–00:03 on the 20th.

    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 19th and 0 of 48 on the 20th.

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

  4. 04

    Tie-break

    Neither night qualifies. The rule takes the second day.

    priority: paraviddha → second-day · margin 100 s < 300 s

  5. 05

    Ruling

    Rāsayātrā, Riyadh, 2086: Wednesday 20 November.

    confidence: boundary (margin)

Say it like this

In Riyadh, Rāsayātrā 2086 falls on Wednesday 20 November. Pūrṇimā runs from 02:27 on Wed 20 Nov to 23:14 on Wed 20 Nov, and reaches niśītha on neither day. It is 1 min 40 s from a threshold: treat the date as contested.

ahargana.org/riyadh/festivals/2086/rasayatra · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 20 Nov
Ahargaṇa, classicalDisc centre, no refractionWed 20 Nov
compat-drikpanchangComparison profileWed 20 Nov
No institution has a recorded ruling for Riyadh.

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 19thCoveredNiśītha 20thCoveredRuled
Los Angeles15:27 → 12:1423:1548 min23:150 min19 Nov
Chicago17:27 → 14:1423:1348 min23:130 min19 Nov
Jersey City18:27 → 15:1423:1848 min23:190 min19 Nov
Port of Spain19:27 → 16:1423:2848 min23:280 min19 Nov
London23:27 → 20:1423:2344 min23:230 min19 Nov
Durban01:27 → 22:1423:180 min23:180 min20 Nov
Dubai03:27 → 00:1423:410 min23:4133 min20 Nov
Delhi04:57 → 01:4423:430 min23:4348 min20 Nov
Kolkata04:57 → 01:4422:580 min22:5948 min20 Nov
Singapore07:27 → 04:1400:260 min00:2748 min20 Nov
Sydney10:27 → 07:1400:170 min00:1748 min20 Nov
Suva11:27 → 08:1423:280 min23:2848 min20 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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