Perpetual calendar watches

Never set the date again

A watch that not only tells the correct time, but also always knows the day, month, and year, even far into the future? That's exactly what the Seiko Astron's perpetual calendar does. This function ensures that your watch automatically accounts for short months, long months, and leap years. Completely independently. No buttons. No corrections.

What is a perpetual calendar?

A perpetual calendar is a high-end complication in the watch world. The mechanism "knows" how many days each month has and automatically corrects the time, even in February and leap years. The Seiko Astron integrates this function into a GPS-controlled movement that goes one step further: the watch also automatically adjusts to the time zone via satellite signals.

The result? A watch you never have to adjust. Not for the time. Not for the date. Not even if you don't wear it for months.