Hi, The date command throws error when the DST is turned on. # date +%s -d "2013/11/20" 1384912800 # date +%s -d "2013/10/20" date: invalid date `2013/10/20' 1 sec after Oct 19 23:59:59 2013 becomes Oct 20 01:00:00 2013 As there is no 0th hour on Oct 20, it shows invalid date. Are there any options to fix this problems ? Has there been a patch posted for this. #date Sun Mar 10 07:02:07 BRT 2013 # zdump -v /etc/localtime | grep 2013 /etc/localtime Sun Feb 17 01:59:59 2013 UTC = Sat Feb 16 23:59:59 2013 BRST isdst=1 gmtoff=-7200 /etc/localtime Sun Feb 17 02:00:00 2013 UTC = Sat Feb 16 23:00:00 2013 BRT isdst=0 gmtoff=-10800 /etc/localtime Sun Oct 20 02:59:59 2013 UTC = Sat Oct 19 23:59:59 2013 BRT isdst=0 gmtoff=-10800 /etc/localtime Sun Oct 20 03:00:00 2013 UTC = Sun Oct 20 01:00:00 2013 BRST isdst=1 gmtoff=-7200 Thanks, Lakshmi