Question about 30th Annversary Gundam Calendar

[Blazing Dagger]

I receintly bought the 30th Annversary Gundam Calendar. However I'm not quite sure how to use it. Being that its Japanies it's a bit different than what I'm use to. The Pages don't have a hole in which to pin the older pages up like a traditional calendar. Do I tear or cut the previous pages off? If anyone elso has got one of these or knows about them I would appriceiate some help. Thanks.