You can use FACTS, or Miami supports an automatic time set function if you can find a remote server with a Daytime service (tcp port 13).
There are drawbacks to either method. First, the clock will obviously be wrong before you go online and fix it. That's not a problem to most but you must obviously run chron/timer stuff after this, if you have any. Second, some apps theoretically don't like having the time set forward by years. I've never heard of anyone having any real problems, though.
