FUNCTION: time_zone_offset() PURPOSE: Returns timezone offset in hours. Will include any offset from daylight savings time Usage: IDL> print,time_zone_offset() -7 IDL> file_touch,somefile,systime(1),/mtime,toffset=time_zone_offset() $LastChangedBy: pcruce $ $LastChangedDate: 2014-02-06 17:49:56 -0800 (Thu, 06 Feb 2014) $ $LastChangedRevision: 14190 $ $URL: svn+ssh://thmsvn@ambrosia.ssl.berkeley.edu/repos/spdsoft/trunk/general/misc/time/time_zone_offset.pro $