I'm writing a script that needs to be called at a random time during the day, but am not sure how to accomplish this.

I don't want to waste server resources to run a cron job every minute.

I want the script to be called at random, so generating the random times for say a month in advance and then creating cron jobs for each of them isn't what I'm looking for.

Also this script only needs to be executed once a day.

Thanks in advance!