Calendar Perpetual

Calendar Perpetual. A perpetual calendar does everything the basic date and annual calendars do, plus it accounts for february’s unique length and leap years. Learn about calendar complications in swiss watches through this informative guide about differences between an annual calendar and a perpetual calendar.

A perpetual calendar is designed to display the days of the week for any date, past or future, often spanning many years. Its core functionality lies in its ability to calculate the.