[Typo3] Current date problem

[Livius Agrippa]

Hi,

I have inserted in TSscript the code below:
temp.DATE = TEXT
temp.DATE {
    data = date:U
    strftime = %A, %e. %B %Y
}
to show the current date on the page
But in fact the pages are rendered from the cache and if I don't delete 
the cache every day, "the current day" is not exactly the current day.

How can I delete automatically the cache every day? Or if somebody else 
had this problem before and knows a better solution.

greetz,
Livius