|IDL Reference Guide: Functional List of IDL Routines|
BIN_DATE - Converts ASCII date/time string to binary string.
CALDAT - Converts Julian date to month, day, year.
CALENDAR - Displays a calendar for a given month or year.
JULDAY - Returns Julian Day Number for given month, day, and year.
SYSTIME - Returns the current time as either a date/time string, as the number of seconds elapsed since 1 January 1970, or as a Julian date/time value.
TIMEGEN - Returns an array of double-precision floating-point values that represent date/times in terms of Julian values.
IDL Online Help (March 06, 2007)