Silly question

I am using Rainlendar2 on my desktop and on my laptop. I already have a batch file on both machines that will copy the calendar file from the opposite computer and overwrite it on whatever machine I'm using. Ideally I'd like a batch file (or shell script?) that compares the "last accessed" attribute across both machines and overwrites the older one with the newer one. Can this be done?

***EDIT***

Nevermind, I found a far simpler way to do this.