A bezel that can be rotated either clockwise or counterclockwise. Lighting on a watch dial that allows the wearer to read the time in the dark. Check out Seiko's Lumi-brite technology. There are several types of calendar watches. Most calendar watches show the information digitally through an aperture on the watch face.
Some chronograph watches shoe the information on sub-dials on the watch face.
There are many variations on the chronograph. Some operate with a center seconds hand which keeps time on the watch's main dial. Others use sub-dials to time elapsed hours, minutes and seconds. Still others show elapsed time on a digital display on the watch face. Some chronographs will measure elapsed time up to 24 hours.