Well, we’ve got a solution for you–a perpetual birthday calendar, and the best part? It’s absolutely free! Never miss another important date! You can use this free printable year after year ...

The perpetual calendar—or quantième perpétuel (“QP”) for the Francophones among us—has been kicking around the horological world for nearly three centuries. Thomas Mudge, an English ...

If you buy from a link, we may earn a commission. Learn more If you’re fortunate enough to own any version of Audemars Piguet’s Perpetual Calendar Royal Oak, no one wants to hear you complain about a ...