Students' ratings of depression have been shown to peak at the end of the first semester in December (though not at the end of semester 2 in April). This increase in depression has been associated with students' perceptions of a higher than average workload, rather than the amount of the workload.

See the source article by following the link below:
Students' ratings of depression have been shown to peak at the end of the first semester in December (though not at the end of semester 2 in April). This increase in depression has been associated with students' perceptions of a higher than average workload, rather than the amount of the workload.