I have a mac with i-calendar on it that my girlfriend can sync her Iphone to, however my work phone is not an Iphone and so sync's to my outlook on my windows laptop.

As a result we are running 2 calendars and I have to remember to manually update the mac with my calendar entry's.

Is there a way of syncing my outlook calendar to the mac so that the I-calendar will show both of our calendar entries?