Annual/ Perpetual Calendar Watch

The simplest and most commonly used of all calendar watches is the single calendar quartz watch. In terms of appearance, the two common types of single calendar quartz watches are the hand type and the window type. The pointer type refers to the usage of hands to indicate the date of the watch. It’s common that there is the large pointer type with an outer ring and the small pointer type with a small disc. The window type has a small window type and a large window with two small windows to indicate the date.

 It's the first step toward automated calendar calculations. The display of our affordable annual calendar watch includes day, date, and month displays, and the open window or pointer design makes reading the time easier. Another distinctive feature of the affordable annual calendar watch is that the machine is able to distinguish between the 30-day month and the 31-day month, with the only errors arising from the transition from late February to early March. Thus the annual calendar watch requires one manual adjustment per year.

Since the annual calendar could not recognize leap months in leap years,  the more complex perpetual calendar appeared. Affordable perpetual calendar watches are more difficult to design because of the problem of dealing with leap year dates, so many models also feature leap year displays.