The article initially covers the historical information regarding two biblical saints „Saint Bartholomew“ and „John the Baptist“ and their birthdays. In vernacular documents from 1900 to 1980 inclusively, the Transylvanian-Saxon names „Bartholomew“ and „John“ were related to the respective saint. The vernacular documents show that their birthdays were playing a role in seasonal determination for peasant work as well as being used in descriptive country sayings, in idioms and in traditional customs. The case examples are taken from