Getting current date without using client's clock

Is there a way to get the current date without using client's clock?
The java application we developed has many windows on which the Current Date is an important display field. As it's used 24x7, we need to make sure the date is current.
Right now, we make a CORBA service call to get the date from the server everytime the user Resets any of these windows. This is causing a peformance issue due to the slow service call.
Is it possible to get the Date once from the server and then start a timer to derive the date thereafter. Will a change in the client's clock affect this logic ? Can we implement this without using client's system time.
Or is there another better way ?
Thanks for your help.

If I can summarize your current requirements:
1. You need to know the time.
2. You don't trust the client's clock so you want to get the time from another computer.
3. You want this access to be "not too slow".
I find requirement number 2 to be peculiar, I've never seen an application that doesn't accept the time on the client system as valid. However, there it is. Maybe it's a system for checking employees in and out, and the smarter ones have been faking out the system by changing the clock. If your CORBA connection is too slow, and NTP is too slow (it takes the little program I got from USNO about 3 seconds to synchronize my clock), why not write your own time server? A simple web server that returns only the time to any request would work. If that's not fast enough then I'd suggest you're out of luck.

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