Ruling · Rāsayātrā · 1953

Friday 20 November

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 148 minutes.

Decide it for

35°42′ N 51°25′ E · Asia/Tehran · GeoNames 112931

The two nights

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

Night of Thursday 19 November

Pūrṇimā is absent from niśītha. Not taken.

niśītha begins 23:26  00:14 niśītha ends
22:3823:0223:2623:5000:1400:3801:02

0 of 48 minutes covered

Night of Friday 20 November

Taken. The only night Pūrṇimā reaches.

niśītha begins 23:26  00:14 niśītha ends
22:3823:0223:2623:5000:1400:3801:02

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 05:43 on Fri 20 Nov to 02:42 on Sat 21 Nov.

    1953-11-20T02:12:58Z → 1953-11-20T23:12:06Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 23:26–00:14 on the 19th, 23:26–00:14 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 48 of 48 on the 20th.

    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 8871 s

  5. 05

    Ruling

    Rāsayātrā, Tehran, 1953: Friday 20 November.

    confidence: determinate

Say it like this

In Tehran, Rāsayātrā 1953 falls on Friday 20 November. Pūrṇimā runs from 05:43 on Fri 20 Nov to 02:42 on Sat 21 Nov and covers all of niśītha that night.

ahargana.org/tehran/festivals/1953/rasayatra · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 20 Nov
Ahargaṇa, classicalDisc centre, no refractionFri 20 Nov
compat-drikpanchangComparison profileFri 20 Nov
No institution has a recorded ruling for Tehran.

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 20thCoveredNiśītha 21stCoveredRuled
Los Angeles18:13 → 15:1223:150 min23:150 min19 Nov
Chicago20:13 → 17:1223:130 min23:130 min19 Nov
Jersey City21:13 → 18:1223:180 min23:190 min19 Nov
Port of Spain22:13 → 19:1223:280 min23:280 min19 Nov
London02:13 → 23:1223:230 min23:230 min20 Nov
Durban04:13 → 01:1223:1748 min23:180 min20 Nov
Dubai06:13 → 03:1223:4148 min23:410 min20 Nov
Delhi07:43 → 04:4223:4348 min23:430 min20 Nov
Kolkata07:43 → 04:4222:5848 min22:590 min20 Nov
Singapore09:43 → 06:4223:5648 min23:570 min20 Nov
Sydney12:13 → 09:1223:1748 min23:170 min20 Nov
Suva14:13 → 11:1223:2848 min23:280 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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