Calendar watches – have a feature that shows the day of the month and often the day of the week and the year.  There are several types of calendar watches.  Some show the date and day of the week with subdials and analog hands.  Others have a scale on the outer rim of the watch face numbered from 1 to 31 for the days of the month.  Others show the day, date and sometimes the year digitally through an aperture on the watch face.

Moon Phase watches – have a window in a watch face that shows which pahse the moon is in.  A disk beneath the window with two pictures of a moon, rotates as the larger or smaller segments of the picture.