The date can be shown i.e. with one hand or digitally with numbers printed on a disk.. The date hand or disk rotates around its axis once every 31 days, advancing by an increment around midnight on each subsequent day. On a hand date display, the numbers 1 through 31 are printed on the dial, and the designated hand tip indicates the current date. Wristwatches with digital date display have a date disk affixed to the front of the movement. The number corresponding to the current date appears inside a small window cut into the dial. A magnifying glass integrated into the crystal improves its readability. A distinction should be made between "crawling" and "hopping"views. The first are gently and gradually advanced by the movement of the clock. The latter continuously absorbs energy from the movement during the course of the day and stores that energy in a spring, which releases its energy reserve right at midnight, making the display of the date of an increase jump forward. Daters may have a single ring, two disks, two concentrically arranged and numbered disks, or a circular and a cruciform disk. In the last variant, the circular disk bears the digits in the "one" column, and the cruciform disk carries the digits (and the blank for single-digit dates) in the "tens"column to indicate the date. These "big date" displays are larger and therefore more easily readable than smaller displays with only one window. which releases its energy reserve right at midnight, making the display of the date of an increase jump forward.

According to international agreement, the dateline almost coincides with the 180th meridian of longitude, which crosses the Pacific Ocean near New Zealand and the Fiji Islands. A westbound traveller crossing the dateline 'loses' a day and jumps forward to the day and date after tomorrow. An eastbound traveller crossing the data line 'gains' a day and repeats the same day and date a second time. This procedure compensates for the differences in dates and days of the week that occur during a circumnavigation.

Representation of time by numbers. Digital indicators for hours, minutes, seconds and / or date were already in use before the invention of quartz watches. Digital hour displays on quartz wristwatches initially used light-emitting diodes (LEDs), but these used too much electricity, so they were soon replaced by liquid crystal diodes (LCDs).

A display, e.g. of time, date, day of the week, month, equation of time, power reserve, time in a second time zone, etc.

A wristwatch worn while swimming or scuba diving must have a waterproof case up to 100 meters; according to German industry standard No. 8306, a diving watch must meet other criteria as well. In addition to its watertightness and good legibility, it must also have a mechanism (such as a bezel that rotates in one direction) that allows to preset the duration of a dive. Readability is also strictly defined. The day time, preset dive time, and watch functions must be clearly readable from a distance of 25 centimeters in complete darkness. Professional diving watches must be water resistant to at least 200 meters. In addition, their waterproofness should be tested at annual intervals. A dive watch that meets all these criteria can carry the DIN (German industrial standard) mark. For their own safety, divers should have the waterproofness of their watches tested twice a year.

The French verb "duplicator" means "to double." At first glance, watches with doubled cases appear to be more precious than they actually are. A usually non-precious substrate is plated with a more or less thin layer of precious metal, for example, by pressing the precious metal layer onto the substructure in a hydraulic press. If the precious metal is gold, the result is called "rolled gold plating." In addition to gold, other precious metals such as silver or platinum can also be employed as plating. The thickness of precious metal plating is measured in microns (thousandths of a millimeter). Twenty microns means that the precious metal layer is 20/1000 or 2/100ths of a millimeter thick. A disadvantage associated with plated wristwatches is that the precious metal coating wears off gradually. The rate at which this occurs depends on how often the watch is worn and the amount of sweat it is exposed to. The backs of plated watches are often made of sturdy stainless steel.

A watch with one face on the front and another on the back. Double-faced pocket watches are much more common than double-faced wristwatches. Modern double-faced wristwatches are available, for example, from Jaeger-LeCoultre "Reverso Duo-Face"and Patek Philippe "Sky Moon Tourbillon".

A watch with two completely separate movements (hand-wound, automatic or quartz) that can be used, for example, to show the time in two different time zones. The main problem associated with wristwatches that have dual movements, and particularly mechanical models, is that the two movements may deviate from synchronisation due to differences in their speeds.