Perpetual Calendar

I am constantly on the hunt for a perpetual calendar. One that tracks birthdays, anniversaries, and special events. For some reason I've lost track of it once I switched from my paper address book (one that had everyone's address and helped you track Christmas cards, like this one on Etsy) to my e-mail address book. The electronic tracking devices are simply lost on me.

I'm still searching for that great calendar, but in the meantime have been happy to be inspired by some others... enjoy!

Caelled "Dorogaya", it's a magnetic calendar that is simple and straightforward. Except that the instructions are in Russian.

A handy on-the-wall chalkboard calendar by who else? Martha Stewart.

A fruit basket perpetual calendar (noting significant and not-so-significant events) from Design Sponge.

A perpetual rotating calendar also from Design Sponge.

A totally awesome photo calendar from PhotoJojo.

I need one that would fit in my pocketbook though. Would they come in a smaller size?