calendar

[Tom Priestly]

My colleague Anrij Hornjatkevyc^ asked me to post the following:
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Tom, would you be so kind to post the following information about Easter
according to the Julian calendar:

In the table below, the first date is according to the Julian calendar, and
the second (13 days later for the 20th and 21st centuries) the same date by
the Gregorian calendar. So for practical scheduling purposes use the second
date.

In the 1930s Easter was celebrated on the following days:

1930    07.04/20.04
1931    30.03/12.04
1932    18.04/01.05
1933    03.04/16.04
1934    26.03/08.04
1935    15.04/28.04
1936    30.03/12.04
1937    19.04/02.05
1938    11.04/24.04
1939    27.03/09.04
1940    15.04/28.04

In the next decade or so, the dates will be as follows:

1997    14.04/27.04
1998    06.04/19.04
1999    29.03/11.04
2000    17.04/30.04
2001    02.04/15.04
2002    22.04/05.05
2003    14.04/27.04
2004    29.03/11.04
2005    18.04/01.05
2006    10.04/23.04
2007    26.03/08.04
2008    14.04/27.04
2009    06.04/19.04
2010    22.03/04.04

I have in my possession a table that permits one to determine the Easter
date by the Julian calendar for any date in history. Feel free to call.
++++++++++++++++++++++++++++++++++++++++++++++++++
In response to the following query from Prof. Rifkin:

> Am
>I correct, however, in assuming that the difference between old and new
>calendars grows by one day as of the year 2000?  (There's been some
>discussion of that on SEELANGS.)  That would mean the second dates listed
>for the years 2000 and later would actually be off by one day.

Andrij responded as follows:

There has indeed been considerable discussion (and more misunderstanding)
about this, but the difference of 13 days between the calendars does not
change from the 20th to the 21st century.

As a general rule, years divisible by 4 are leap years, but in the Gregorian
system this does not apply to century years, unless they are divisible by
400. As a result of this, the difference between the Julian and Gregorian
calendars increased by one day in 1700, 1800 and 1900 because these were
leap years in the Julian system, but not the Gregorian one. 2000, however,
is divisible by 400 (as was 1600), making it bissextile, so on that year the
difference between the calendars will not increase by a day.

Have I made myself perfectly obscure?

Andrij Hornjatkevyc

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dr. Andrij Hornjatkevyc
CIUS                                                           MLCS/SEES
352 Athabasca Hall                                    200 Arts Building
University of Alberta                                    University of Alberta
tel. (403)492 29 72                                      (403)492 07 33
fax (403)492 49 67                                      (403)492 27 15
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
*  Tom Priestly
*  (President, Society for Slovene Studies)
*  Modern Languages and Comparative Studies
*  University of Alberta
*  Edmonton, Alberta, Canada T6G 2E6
---------------------------------------------------------------

*  telephone:   403 - 492 - 4219
*  fax:                403 - 492 - 2715

*  email:           tom.priestly at ualberta.ca
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^