Starting in 2007, daylight time begins in the United States on the second Sunday in March and ends on the first Sunday in November. On the second Sunday in March, clocks are set ahead one hour at 2:00 a.m. local standard time, which becomes 3:00 a.m. local daylight time. On the first Sunday in November, clocks are set back one hour at 2:00 a.m. local daylight time, which becomes 1:00 a.m. local standard time. These dates were established by Congress in the Energy Policy Act of 2005, Pub. L. no. 109-58, 119 Stat 594 (2005).

Some older cisco IOS routers don’t have the new time zone information. Below is an example of my time related configuration, including NTP and logging options. Configure this and you will no longer be lost when looking at logs! :)

My timezone is obviously Pacific, but you can insert your own. CDT, EDT, CST, EST, etc :)

service timestamps debug datetime localtime
service timestamps log datetime localtime
clock timezone PST -8
clock summer-time PDT recurring 2 Sun Mar 2:00 2 Sun Nov 2:00
ntp logging
ntp update-calendar
ntp server 4.us.pool.ntp.org
ntp server 2.us.pool.ntp.org
ntp server 1.us.pool.ntp.org
ntp server 3.us.pool.ntp.org
ntp server 0.us.pool.ntp.org