Dealing SAS Date/time

/* Program 1: how to transfer Date, Time in character format to date/time format? */
data test;
  date='05/04/00';
  time='10:05';
run;

data new; set test;
  sasdate1=input(date, mmddyy8.);
  sasdate2=sasdate1;

  sastime1=input(time, time5.);
  sastime2=sastime1;

  datetim1=input(put(sasdate1,date7.)||':'||time,datetime16.);
  datetim2=datetim1;

  ** created sasdate2, sastime2, datetim2 for display purposes only **;
run;

proc print data=new;
  var sasdate1 sasdate2 sastime1 sastime2 datetim1 datetim2;
  format sasdate2 mmddyy8.
         sastime2 hhmm5.
         datetim2 datetime16.;
run;



/* How to deal with time variable in SAS/Graph? */
data one;
   input startime time5. count;
   if startime gt '12:00't then date='30sep92'd;
      else date='01oct92'd;
   datetime=dhms(date,hour(startime),minute(startime),
            second(startime));
   cards;
16:00 12.3
17:00 5.7
18:00 8.6
19:00 9.0
20:00 15.7
21:00 10.5
22:00 8.1
23:00 1.5
0:00  11.3
1:00  6.6
2:00  3.5
3:00  7.6
4:00  2.4
5:00  13.8
6:00  14.0
7:00  4.9
8:00  5.0
run;

proc print;
   var startime datetime;
run;

proc gplot data=one;
   plot count*datetime
        / haxis='30sep92:16:00'dt to '01oct92:08:00'dt
                by hour2;
   format datetime tod5.;
run;