ClockWise is the ultimate time utility for Windows.
Includes a digital clock, time client, calendar, timer, stopwatch, dial-up network timer, scheduler, and reminder system.

You can automate everything! You can schedule up to 200 external or built-in events! Run or close any program whenever you want. Built-in options include system reboot, shutdown, automatically setting the system time to the atomic clock at NIST or any Internet NTP server, connection or disconnection from the Internet and Active Desktop refresh. On-line timer log includes daily, weekly and monthly stats.

The 24-city time zone window now has over 720 cities to choose from, and ClockWise even includes a useful time/date screen-saver!