In the Czech Republic, each day of the year except national holidays corresponds to a personal name. People celebrate their name day ("svátek" or more formally "jmeniny") on the date corresponding to their own given name. In the past, parents were not allowed to choose just any name for a child. This has changed, although it is still common to choose the name from the name day "calendar" and any highly unusual name has to be approved by a special office. The original list was the Roman Catholic calendar of saints, but many changes were made to reflect the present-day usage of names. The name day...