# cat zic.txt Rule EDT minimum maximum - Mar Sun>=8 02:00:00 -6:0:0 - Rule EDT minimum maximum - Nov Sun>=1 02:00:00 0 - Zone localtime +5:0:0 EDT EST/EDT # zic -d . zic.txt "zic.txt", line 3: too many transitions?! (rule from "zic.txt", line 1) Bug or invalid input? Thanks