You can use the SAS INPUT function in a DATA step to convert a text-string in the format you mentioned in your post to a SAS numeric variable. When converted, the value will represent seconds, and so then you choose a SAS FORMAT to display your data as needed.
The SAS support website
http://support.sas.com/ and its SEARCH facility can provide both documentation and supplemental technical conference topic material.
Scott Barry
SBBWorks, Inc.