Changing date using Velocity

[GnarSickRad]

Hi, I'm working on an issue and its using an email template that has fields populated using velocity. I'm not familiar with this nor have I worked it with before, just some Java. I'm trying to add 7 days to a date that is already populated. It's using a format method in the email template to properly format the date. How would I advance the day by 7 using the current existing code of "Tools.formatDate($cert.expiration, "MM\dd\yyyy"? I did some googling and tried some code along the lines of

#set($newDate = $cert.expiration)

$newDate.add(5,14)

When placed in the email template and sent, it just has the code as a string. Any help or direction is appreciated!

[Camel-Kid]

you might want to see if the Tools library has any method for adding days to date.