Ruling · Rāsayātrā · 2009

Sunday 1 November

Determinatein Cairo, under the Rashtriya Panchang method. Clear of every threshold by 52 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 Sunday 1 November

Taken. The only night Pūrṇimā reaches.

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

48 of 48 minutes covered

Night of Monday 2 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

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 22:23 on Sun 1 Nov to 21:14 on Mon 2 Nov.

    2009-11-01T20:23:04Z → 2009-11-02T19:13:55Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 23:15–00:03 on the 1st, 23:15–00:03 on the 2nd.

    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 1st and 0 of 48 on the 2nd.

    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 3104 s

  5. 05

    Ruling

    Rāsayātrā, Cairo, 2009: Sunday 1 November.

    confidence: determinate

Say it like this

In Cairo, Rāsayātrā 2009 falls on Sunday 1 November. Pūrṇimā runs from 22:23 on Sun 1 Nov to 21:14 on Mon 2 Nov and covers all of niśītha that night.

ahargana.org/cairo/festivals/2009/rasayatra · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 1 Nov
Ahargaṇa, classicalDisc centre, no refractionSun 1 Nov
compat-drikpanchangComparison profileSun 1 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 1stCoveredNiśītha 2ndCoveredRuled
Los Angeles12:23 → 11:1423:1348 min23:130 min1 Nov
Chicago14:23 → 13:1423:1148 min23:110 min1 Nov
Jersey City15:23 → 14:1423:1648 min23:160 min1 Nov
Port of Spain16:23 → 15:1423:2648 min23:260 min1 Nov
London20:23 → 19:1423:2148 min23:210 min1 Nov
Durban22:23 → 21:1423:1548 min23:150 min1 Nov
Dubai00:23 → 23:1423:393 min23:390 min1 Nov
Delhi01:53 → 00:4423:410 min23:4148 min2 Nov
Kolkata01:53 → 00:4422:560 min22:5648 min2 Nov
Singapore04:23 → 03:1400:240 min00:2448 min2 Nov
Sydney07:23 → 06:1400:150 min00:1548 min2 Nov
Suva08:23 → 07:1423:260 min23:2648 min2 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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