I have written up a python script that allows a user to input a message, his email and the time and they would like the email sent. This is all stored in a mysql database.

However, how do I get the script to execute on the said time and date? will it require a cron job? I mean say at 2:15 on april 20th, the script will search the database for all times of 2:15, and send out those emails. But what about for emails at 2:16?

I am using a shared hosting provided, so cant have a continously running script.

Thanks