Alert

Hi,

I have requirement where in I need to create an Alert for New Joinees  one week before every 30 days from the date of joining and also need to send Alert to Manager 2 weeks after 30 days if the Manager has not completed the review for the employee. Its a periodic Alert. I have two different Templates one for sending Alert one week before 30 days and the other for 2 weeks after 30 days if Manager has not completed the review of employee.  For the above requirement do I need to write two Alerts or it can be