The ExpiresAbsolute property specifies the date and time at which a page cached on a browser expires. If the user returns to the same page before that date and time, the cached version is displayed. If a time is not specified, the page expires at midnight of that day. If a date is not specified, the page expires at the given time on the day that the script is run.
Response.ExpiresAbsolute [= [date] [time]]
If this property is set more than once on a page, the earliest expiration date or time is used.
The following example specifies that the page will expire 15 seconds after 1:30 pm on May 31, 1996.
<% Response.ExpiresAbsolute=#May 31,1996 13:30:15# %>