What to do with Coldsnap??

For those of you who organize your physical collections by set, what do you do with Coldsnap? Do you place it between the Ravnica and Time Spiral blocks, ordered by release date? Or with Ice Age and Alliances?

Aesthetically, the idea of having a single set in the modern card frame amongst all the old card frames bugs me. But both for keeping the Ice Age block together and, more importantly, for keeping Coldsnap out of modern-legal cards, it makes sense to put it with the old ones.

Thoughts?