In terms of campus life and activities are there any days of the week on which you'd recommend a first year definitely schedule classes?
Well the UMSU BBQs (free for all) are always accompanied by bands on the Mondays and Tuesdays. The bands/performers on the Mondays are pretty average, but the ones on Tuesday are usually kind of well known bands like Evermore, The Medics, The Bamboos, Snakadaktal, Washington, Ash Grunwald, The Rubens etc. They go from 1-2pm usually so if you like live acts then definitely have classes on Tuesdays and keep that slot free
Also last year, for the first term at least, there was a pub crawl/night every Wednesday, but after the 3rd one not many people showed up at all unless it a particularly hyped up one. Other than that there's something called Kegs 'n' Sun that's on the last Friday before each of the 4 breaks of the year which can be a bit of fun.
But yeah other than that there really isn't anything regular or concrete, it could be any day of the week really - but the major stuff like the Balls, after exams parties and boat parties are all obviously at night, there really isn't too much on in the day unless it's Prosh wekk
You'd probably have all/most of your lectures on Mondays and Wednesdays (and Fridays if you're studying Science), so I'd say put some pracs/tutorials on Tuesday for the bands. The only thing you'd miss on Thursdays would be the BBQ run by the Science and/or Arts societies, which is just a free feed and a chance to hang out with friends.
But yeah, apart from the bands I can't really think of anything else that would be all that noteworthy.