The digital clock you'll see running on the Young Wizards site is keeping time according to the Julian Day system -- the preferred method of measuring Earth time for wizards living or working here. Julian dating's extreme accuracy and flexibility makes it easier to tell exactly when that crucial spell is going to start (or stop) working...or, for that matter, when you're supposed to be home for dinner. (Since "But it was only two o'clock on Pluto...!" isn't likely to get you out of trouble more than once.*)

Julian dates are unaffected by calendar weirdnesses (like leap-year days), time-zone changes (making the system useful for keeping track of time back home when you're off planet), or such strictly local and often confusing phenomena as Daylight Savings. All these factors make the JD system ideal for use by wizards on the go.