This month’s calendar, by Mithsuca Berry, makes us think of the duck/rabbit and young woman/old woman illusions that elementary school science and art teachers truck out as introductions to visual perception. Is this girl looking back at everything that happened in 2015? Or is she gazing ahead, into an unknowable future? IS TIME EVEN REAL?!?!? Insofar as “December” is already underway, here is a beautiful way to keep track of the “days”:

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