Each semester goes quicker than the last as an undergrad. It’s probably the same for anything other multi-year commitment you make.
As a final year student I’ve been busy taking the last courses I’ll do as an undergraduate student, and there’s been lots to do.
We started the year off with our field trip to Oban (west coast of Scotland). There we had a lecture or two a day about what we’d be getting up to and the kind of knowledge we’d need to understand all the cool stuff we were going to see and do. We saw the most productive community owned wind farm in Scotland and went to the beach to learn about shoreline ecology. We planted some tree seedlings and met with park rangers to talk about forest diversity. We picked a field project topic, planned it, and gathered all our data in the last 2 days. But still had time to go to the pub once or twice.