How to add 1day 2hours 3mins 4sec to 01jan2020:00:00:00 ?

[Saikiran_Mamidi]

01jan2020:00:00:00 

IF I INCREMENT 1DAY 2HRS 3MINS 4SECS WHAT IS THE OUTPUT? AND HOW TO ADD ?

CAN I GET CODE PLEASE, HIGHLY APPRECIATED...

[PaigeMiller]

data example;
    datetime='01jan2020:00:00:00'dt;
    incremented_datetime= datetime 
        + 24*60*60 /* adds one day, in seconds */
        + 2*60*60 /* adds two hours, in seconds */
        + 3*60 /* adds 3 minutes, in seconds */
        + 4 /* adds four seconds */ ;
     format datetime incremented_datetime datetime16.;
run;

[novinosrin]

data test;
 dt='01jan2020:00:00:00'dt;
 increment=1;
 dt=intnx('dtday',dt,increment)+'2:3:4't;
 format dt datetime20.;
run;

[data_null__]

Durations can be stored as date-time,  

34         data _null_;
35            dt = dhms('01jan2020'd,0,0,0);
36            duration = dhms(1,2,3,4);
37            x  = sum(dt,duration);
38            put (dt duration x) (=datetime22.) duration=time12.;
39            run;

dt=01JAN2020:00:00:00 duration=02JAN1960:02:03:04 x=02JAN2020:02:03:04 duration=26:03:04