The classic explanation is that in times past the students did not necessarily own watches and had to rely on the church bells to know what time it was. When you heard the bells of Lund’s cathedral strike the full hour, you knew you had fifteen minutes to gather your things and present yourself for class.
Another explanation is that the quarter allowed for teachers and students to get to their next classes on time.
Is it just a quaint relic of the past or does the academic quarter still serve a purpose?
Well the answer is actually “yes” on both accounts. Few, if anyone, rely on the church bells for time keeping, but classes do still tend to end on the hour, making it practical to start the next lecture fifteen minutes later.
At the same time, not everything at the university uses the academic quarter, so how does it work?
The academic quarter is in effect for: classes, lectures, and seminars before 18:00. In these cases, time is written as 1, 2, 3, 4…
Strict punctuality is expected for: exams, board meetings, meetings with non teaching staff. If there is a dot “.” (or double dot “..” after 18:00) after the given time, or if the time is given in both hour and minutes, such as 15:15. Meetings between students and their supervisors/teachers are somewhat unclear, but usually it is best to arrive at the exact time.
And then there is the double quarter… The double quarter is standard for events and festivities that start after 18:00, but since many fail to take this tradition seriously we end up with some extra time for mingling before things start.
The practice of the academic quarter goes back hundreds of years and in all likelihood it was imported to Sweden from German speaking countries where the practice still lives on today. In Sweden the academic quarter is more or less a strictly Lundensian affair. Uppsala University still tends to start is classes at a quarter past the hour, but they also write it explicitly.