Ruling · Rāsayātrā · 1926

Thursday 18 November

Determinatein Cairo, under the Rashtriya Panchang method. Clear of every threshold by 160 minutes.

Decide it for

30°04′ N 31°15′ E · Africa/Cairo · GeoNames 360630

The two nights

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

Night of Thursday 18 November

Taken. The only night Pūrṇimā reaches.

niśītha begins 23:16  00:04 niśītha ends
22:2822:5223:1623:4000:0400:2800:52

48 of 48 minutes covered

Night of Friday 19 November

Pūrṇimā is absent from niśītha. Not taken.

niśītha begins 23:17  00:05 niśītha ends
22:2922:5323:1723:4100:0500:2900:53

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 20:36 on Thu 18 Nov to 18:21 on Fri 19 Nov.

    1926-11-18T18:35:57Z → 1926-11-19T16:20:57Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 23:16–00:04 on the 18th, 23:17–00:05 on the 19th.

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

  3. 03

    Rule

    Pūrṇimā must be present during niśītha. It covers 48 of 48 minutes on the 18th and 0 of 48 on the 19th.

    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 9626 s

  5. 05

    Ruling

    Rāsayātrā, Cairo, 1926: Thursday 18 November.

    confidence: determinate

Say it like this

In Cairo, Rāsayātrā 1926 falls on Thursday 18 November. Pūrṇimā runs from 20:36 on Thu 18 Nov to 18:21 on Fri 19 Nov and covers all of niśītha that night.

ahargana.org/cairo/festivals/1926/rasayatra · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 18 Nov
Ahargaṇa, classicalDisc centre, no refractionThu 18 Nov
compat-drikpanchangComparison profileThu 18 Nov
No institution has a recorded ruling for Cairo.

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 18thCoveredNiśītha 19thCoveredRuled
Los Angeles10:36 → 08:2123:1448 min23:150 min18 Nov
Chicago12:36 → 10:2123:1248 min23:120 min18 Nov
Jersey City13:36 → 11:2123:1848 min23:180 min18 Nov
Port of Spain14:36 → 12:2123:2748 min23:280 min18 Nov
London18:36 → 16:2123:2248 min23:220 min18 Nov
Durban20:36 → 18:2123:1748 min23:170 min18 Nov
Dubai22:36 → 20:2123:4048 min23:400 min18 Nov
Delhi00:06 → 21:5123:4224 min23:430 min18 Nov
Kolkata00:06 → 21:5122:580 min22:580 min19 Nov
Singapore01:36 → 23:2123:260 min23:260 min19 Nov
Sydney04:36 → 02:2123:160 min23:1648 min19 Nov
Suva06:36 → 04:2123:270 min23:2848 min19 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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