query caching at specific time of day ?

I'm currently using:

cachedwithin=#CreateTimeSpan(1,0,0,0)#

If I'm happy my data won't change during the day, is it possible to cache a query at a pre-determined time, eg. during the early hours when I know it's unlikely anyone is on the site, say 5am ? That way,I know the query is cached and ready for anyone who asked for it ?