This tutorial explains how to manipulate date values with SAS.
System Dates (Current Date)
Task - Number of intervals (Years /Months / Days) from birth date to today's date
Important Points
1. January 1, 1960 is the zero point for SAS. Any day before 1/1/1960 is a negative number, and any day after that is a positive number.
Old dates can be subject to producing incorrect dates in SAS. You may not get a missing value, but make sure that you check your century. The YEARCUTOFF option gives you the capability to define a 100-year range for two-digit year values. The default value for the YEARCUTOFF option is 1920, giving you a range of 1920- 2019.
2. Subsetting Date Formatted Data
DATEPART and TIMEPART Functions
DATEPART returns the date from a SAS datetime value. Whereas, TIMEPART returns the time from a SAS datetime value.
System Dates (Current Date)
data _null_;
a = date();
b = today();
c = "&sysdate"d;
put 'Without Format: ' a = b = c =;
run;
See Log
Without Format: a=20480 b=20480 c=19749Make Date Values Formatted
data _null_;See Log
a = date();
b = today();
c = "&sysdate"d;
format a b c ddmmyy10.;
put 'With Format: ' a = b = c = ;
run;
With Format: a=27/01/2016 b=27/01/2016 c=26/01/2014SAS Date Formats
data dates;
date1 = put(date(),mmddyy8.);
date2 = put(date(),WORDDATE.);
run;
![]() |
SAS Date Formats |
Date Functions
![]() |
SAS Date Functions |
data _null_;Date Calculations
birthdt = '22oct91'd;
date1 = day(birthdt);
date2 = month(birthdt);
date3 = year(birthdt);
date4 = qtr(birthdt);
date5 = weekday(birthdt);
put date1 date2 date3 date4 date5;
run;
Task - Number of intervals (Years /Months / Days) from birth date to today's date
Functions - DATDIF and INTCK
data _null_;
birthdt = '22oct91'd;
date5 = datdif(birthdt, date(), 'ACT/ACT');
date55 = intck('day',birthdt, date());
date6 = intck('year',birthdt, date());
date7 = intck('qtr',birthdt, date());
date8 = intck('week',birthdt, date());
put date5 date55 date6 date7 date8;
run;
Note : 'ACT' refers to the actual number of days between dates. Each month is considered to have the actual number of calendar days in that month, and each year is considered to have the actual number of calendar days in that year.
Task - When customer will retire (60 years old)
The INTNX function advances a date value by a given interval and returns a date value.
data _null_;Additional Parameter in INTNX Option
birthdt = '22oct91'd;
retirement = intnx('year',birthdt, 60);
put retirement date9.;
run;
date10 = intnx('month',date(), 5, 'sameday');
date11 = intnx('month',date(), 5, 'end');
Important Points
options yearcutoff = 1890;In the code above, yearcutoff = 1890 takes century from 1890 to 1989.
data _null_;
birthdt = '22oct91'd;
currdt = '22oct51'd;
diff = intck('year',birthdt, currdt);
put diff;
run;
2. Subsetting Date Formatted Data
data temp2;
set temp;
where date >= '1jan1991'd;
run;
DATEPART and TIMEPART Functions
DATEPART returns the date from a SAS datetime value. Whereas, TIMEPART returns the time from a SAS datetime value.
data _null_;
x='21oct16:8:45'dt;
xx=datepart(x);
xxx=timepart(x);
put xx worddate.;
put xxx time.;
run;
You made it sooooooooo..... easy..thank u
ReplyDeleteFebruary 1
DeleteHow to print multiple date formats in proc print option
ReplyDeleteMany, many thanks!!!
ReplyDeleteis there anyother format option instead of timedate ? bcz this format is not working on portable software.
ReplyDeleteThanks for such a nice explanation!
ReplyDeletereally good explanation.
ReplyDeletekmk
ReplyDeleteHow can I convert the value x=01012017 [Numeric value] into sas date value,like (01Jan2017)
ReplyDeleteUse mdy() function
DeleteUsing date9. Format
Deletedata mydatte;
ReplyDeletex=today();
format x date9.;
run;
14may18 this is the answer
DeleteI am beginner this tips will helpful for sure thanks
ReplyDeletetutuapp apk
instagram sign up
Sir, what is difference between date() and today() function.?
ReplyDeleteboth are same.
DeleteToday() is another name for the date()
Please check your sysdate format...it seems wrong and below is the correct values from log.
ReplyDeletedata _null_;
25 a = date();
26 b = today();
27 c = "&sysdate"d;
28 format a b c ddmmyy10.;
29 put 'With Format: ' a = b = c = ;
30 run;
With Format: a=18/12/2020 b=18/12/2020 c=18/12/2020