There is a function fdtm in EK RTF report formats.
fdtm uses FormatDateTime Delphi function to format dates. Syntax is fdtm(variable,format_string), where format_string is a constant or report variable with pattern for FormatDateTime function. 

For example: 

var1='2/15/95 10:30am' 
format_var='"The meeting is on" dddd, mmmm d, yyyy, "at" hh:mm AM/PM' 

Field \fdtm(var1,format_var)\ in the report will be: The meeting is on Wednesday, February 15, 1995 at 10:30 AM 

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