Ah. Functioning as designed. And it's pretty darned close. I did a quick run of some "leap baby" years (1960, 1964, and 1968) comparing them to the years 2000 - 2016. You're only off one day per year, February 28th. Impact = small. But perhaps something to be aware of.

Jim

Obs birthDate asOfDate SASAge correctAge Year_Type
1 29FEB1960 28FEB2000 40 39 Leap Year
2 29FEB1960 28FEB2001 41 40
3 29FEB1960 28FEB2002 42 41
4 29FEB1960 28FEB2003 43 42
5 29FEB1960 28FEB2004 44 43 Leap Year
6 29FEB1960 28FEB2005 45 44
7 29FEB1960 28FEB2006 46 45
8 29FEB1960 28FEB2007 47 46
9 29FEB1960 28FEB2008 48 47 Leap Year
10 29FEB1960 28FEB2009 49 48
11 29FEB1960 28FEB2010 50 49
12 29FEB1960 28FEB2011 51 50
13 29FEB1960 28FEB2012 52 51 Leap Year
14 29FEB1960 28FEB2013 53 52
15 29FEB1960 28FEB2014 54 53
16 29FEB1960 28FEB2015 55 54
17 29FEB1960 28FEB2016 56 55 Leap Year
18 29FEB1964 28FEB2000 36 35 Leap Year
19 29FEB1964 28FEB2001 37 36
20 29FEB1964 28FEB2002 38 37
21 29FEB1964 28FEB2003 39 38
22 29FEB1964 28FEB2004 40 39 Leap Year
23 29FEB1964 28FEB2005 41 40
24 29FEB1964 28FEB2006 42 41
25 29FEB1964 28FEB2007 43 42
26 29FEB1964 28FEB2008 44 43 Leap Year
27 29FEB1964 28FEB2009 45 44
28 29FEB1964 28FEB2010 46 45
29 29FEB1964 28FEB2011 47 46
30 29FEB1964 28FEB2012 48 47 Leap Year
31 29FEB1964 28FEB2013 49 48
32 29FEB1964 28FEB2014 50 49
33 29FEB1964 28FEB2015 51 50
34 29FEB1964 28FEB2016 52 51 Leap Year
35 29FEB1968 28FEB2000 32 31 Leap Year
36 29FEB1968 28FEB2001 33 32
37 29FEB1968 28FEB2002 34 33
38 29FEB1968 28FEB2003 35 34
39 29FEB1968 28FEB2004 36 35 Leap Year
40 29FEB1968 28FEB2005 37 36
41 29FEB1968 28FEB2006 38 37
42 29FEB1968 28FEB2007 39 38
43 29FEB1968 28FEB2008 40 39 Leap Year
44 29FEB1968 28FEB2009 41 40
45 29FEB1968 28FEB2010 42 41
46 29FEB1968 28FEB2011 43 42
47 29FEB1968 28FEB2012 44 43 Leap Year
48 29FEB1968 28FEB2013 45 44
49 29FEB1968 28FEB2014 46 45
50 29FEB1968 28FEB2015 47 46
51 29FEB1968 28FEB2016 48 47 Leap Year