Simple joomla date fix

We are just looking for someone to fix a problem with the date on our website at [login to view URL] Every day at 11am (Sydney time) it switches forward to the correct day, so it is running about 11 hours behind in changing the date at the top of the page in the header. It is the date that appears just under the clocks. Wether this can be fixed through the joomla interface or if it needs to be corrected through the code directly is something you will have to investigate, but someone who is joomla savvy should have no problem working the problem out and fixing it. If you don't have extensive experience with joomla, please do not bother to bid.