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     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.

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These sample files and code examples are provided by SAS Institute Inc. "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Recipients acknowledge and agree that SAS Institute shall not be liable for any damages whatsoever arising out of their use of this material. In addition, SAS Institute will provide no support for the materials contained herein.

/***************************************************************************************/
/* 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;

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These sample files and code examples are provided by SAS Institute Inc. "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Recipients acknowledge and agree that SAS Institute shall not be liable for any damages whatsoever arising out of their use of this material. In addition, SAS Institute will provide no support for the materials contained herein.

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

     http://aa.usno.navy.mil/faq/docs/easter.html

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