Using bootstrap3-datetimepicker to schedule an event

In an app I’m working on, I want the user to be able to set a time and date for an event to be fired. Basically, there’s a task that need to be run weekly, but not at the same time each week (or even on the same day each week). I’ve got the server method working when a button is clicked, but ideally it should be automated.

At the moment I’m using bootstrap3-datetimepicker for user entry of when to schedule the event, but I’m unsure of how to use the value. Is synced-cron the right option? Are there any examples of it being used the way I’d like to use it?