How To Use Perpetual calendar In A Sentence

The dial has been skeletonised to reveal the perpetual calendar tourbillon calibre 461 in all its mechanical glory. Times, Sunday Times
Now it has watches of almost all classes – from conventional automatic to perpetual calendar.
It's self winding, has a minute repeater, perpetual calendar, equation of time, jumping hour, power reserve indicator, and a bimetallic thermometer – everything but MMS messaging.
One of the results of his diversion was an 1887 perpetual calendar algorithm for calculating the day of the week for a given date.
It's self winding, has a minute repeater, perpetual calendar, equation of time, jumping hour, power reserve indicator, and a bimetallic thermometer – everything but MMS messaging.

Patek Philippe Platinum And Diamond-Set Perpetual Calendar Chronograph Wristwatch With Register, Moon-Phases And Leap Year Indication, c. 2010, Ref 5971P.
This is the JLC Reverso Grande Complication à Triptych, Tourbillon with in-house escapement sideral time, perpetual calendar with equation of time with zodiac signs and sunrise and sunset indications. Jaeger Le-Coultre, Reverso Grande Complication à Triptych
It has three alarms, three time zones and a perpetual calendar. Times, Sunday Times
It has three alarms, three time zones and a perpetual calendar. Times, Sunday Times
It has three alarms, three time zones and a perpetual calendar. Times, Sunday Times