I have a website where I have many users coming from different countries. Users can schedule a task based on their timezone. Now there is a cron running on the server after every min, the cron executes a script which checks if there are any scheduled task of any user and if so it does the needful.

Since my server is based in the US, the script executed by the cron considers the timezone of the US. What do I have to do in my script that will execute the user's task based on user's timezone instead of server's timezone?

Thanks in advance for any ideas