As an fyi, I receive compile errors when I compile (using "zic") the time zone database downloaded in the tzdata2003d.tar file from your ftp://elsie.nci.nih.gov/pub/ site. The error messages read: "northamerica", line 954: invalid time of day "northamerica", line 955: invalid time of day "northamerica", line 978: invalid time of day "northamerica", line 979: invalid time of day Those lines in the northamerica file are below. Is it safe to assume I need to change the 24:00 references to 0:00 instead? Has anyone else run into this problem? Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D Rule Mont 1927 1937 - Sep lastSat 24:00 0 S Rule Toronto 1930 1937 - Apr lastSat 24:00 1:00 D Rule Toronto 1930 1937 - Sep lastSat 24:00 0 S Thanks for your help, Diane Kledzik