Sample 25993: Using SAS to determine dates for Easter
This sample code is based upon an algorithm described on the U.S. Naval Observatory Website:
http://aa.usno.navy.mil/faq/docs/easter.html
Sample provided as is, no warranties expressed or implied.
For other US holidays, see Using SAS to determine dates for holidays.
/***************************************************************************************/
/* This sample code is based upon an algorithm described on the U.S. Naval Observatory */
/* Website: http://aa.usno.navy.mil/faq/docs/easter.html */
/* */
/* This sample provided 'as is', no warranties expressed or implied. */
/***************************************************************************************/
data a (keep=easter_date);
format easter_date worddate.;
do year=1980 to 2024;
c=int(year/100);
n=year-(19*int(year/19));
k=int((c-17)/25);
i=c-int(c/4)-int((c-k)/3)+(19*n)+15;
i=i-(30*int(i/30));
i=i-(int(i/28)*(1-int(i/28)*int(29/(i+1))*int((21-n)/11)));
j=year+int(year/4)+i+2-c+int(c/4);
j=j-(7*int(j/7));
month=3+int((i-j+40)/44);
day=i-j+28-(31*int(month/4));
easter_date=mdy(month,day,year);
output;
end;
run;
proc print;
run;
Obs easter_date
1 April 6, 1980
2 April 19, 1981
3 April 11, 1982
4 April 3, 1983
5 April 22, 1984
6 April 7, 1985
7 March 30, 1986
8 April 19, 1987
9 April 3, 1988
10 March 26, 1989
11 April 15, 1990
12 March 31, 1991
13 April 19, 1992
14 April 11, 1993
15 April 3, 1994
16 April 16, 1995
17 April 7, 1996
18 March 30, 1997
19 April 12, 1998
20 April 4, 1999
21 April 23, 2000
22 April 15, 2001
23 March 31, 2002
24 April 20, 2003
25 April 11, 2004
26 March 27, 2005
27 April 16, 2006
28 April 8, 2007
29 March 23, 2008
30 April 12, 2009
31 April 4, 2010
32 April 24, 2011
33 April 8, 2012
34 March 31, 2013
35 April 20, 2014
36 April 5, 2015
37 March 27, 2016
38 April 16, 2017
39 April 1, 2018
40 April 21, 2019
41 April 12, 2020
42 April 4, 2021
43 April 17, 2022
44 April 9, 2023
45 March 31, 2024
This sample code is based upon an algorithm described on the U.S. Naval Observatory Website:
http://aa.usno.navy.mil/faq/docs/easter.html
| Type: | Sample |
| Topic: | SAS Reference ==> DATA Step
Data Management ==> Manipulation and Transformation ==> Date and Time
SAS Reference ==> Functions ==> Date and Time ==> MDY
|
| Date Modified: | 2008-04-16 15:41:28 |
| Date Created: | 2005-12-15 17:03:08 |
Operating System and Release Information
| SAS System | Base SAS | All | n/a | n/a |
