The TODAY function returns an IDLDT date/time structure containing the current system date and time. The TODAY function uses VAR_TO_DT and SYSTIME.
Result = TODAY()
PRINT, TODAY() ; Print the date time structure on the day this was written.
IDL prints:
% Compiled module: TODAY.
% Compiled module: BIN_DATE.
% Compiled module: JULDAY.
{ 1998 3 9 12 11 39.0000 2450882.0 0}
IDLDT__DEFINE