One thing which caught my eye time and time again was the Perpetual Calendar complication. Credit: Sam Cross I lost count of the times I saw them on different models and booths, actually.

Don’t miss this handy freebie: a perpetual birthday calendar that’s perfect for keeping track of birthdays and other spe ...

Calendar systems include solar and lunar calendars that guide planting and harvest as well as synchronized electronic appointment books that keep modern societies humming along. Perpetual calendars ...

The ultra-thin new Piaget Polo Perpetual Calendar watch now features completely unique stone dials in blue and green hues ...

Just when you think you’ve seen them all, someone comes up with something new and unusual, like the concentric rings of this automated perpetual calendar. What we really like about the design ...

Audemars Piguet’s new Royal Oak Perpetual Calendar is a very clever piece of engineering, an answer to a problem that’s been annoying watchmakers and collectors for decades, which is this. QPs, as ...