When creating a personalized calendar you will likely be given several options of paper for printing on. While the cheapest may be the most appealing to your bank account, splashing out a little extra can give a much more high-end look to the final product.
It's much easier to write on matte paper than glossy so if there's a section for noting down dates it might be worth going for matte instead but if it's all about the photos glossy or lustre can give a really nice shiny finish.