It is up to you when you wear your watch, if at all. Yet it can be useful to know the etiquette. For instance, for a long time it wasn't the norm to wear a watch at formal occasions, like a wedding. Keeping an eye on the time was deemed insulting to the host or hostess. However, nowadays people often wear a formal watch design with a simple strap at formal occasions. If casual is the order of the day then the world is your oyster, with a choice ranging from rugged and functional to lavish and striking. For that matter, combining a bracelet with a watch works equally well.