This week's calendar post takes on math and science, with year-long studies of geometry, patterns and gems.
Julia Kostreva's Prisms. A 2014 letterpress wall calendar inspired by geometry, it features line drawings of prisms printed in gold foil on beautiful sand colored speckletone paper - two elements that play with the light almost as much as their subject matter.
Pieces and Patterns illustrated offering from 1canoe2. A modern geometric wall calendar, it takes its inspiration from quilts as well as studies of colors and patterns.
Rocket Ink's Gem + Mineral Calendar is truly a work of art. Featuring 12 gorgeous watercolors, each illustration is all set to be turned into its own print when the month is done.