Other uni's generally start prac 2nd semester of 1st year with a 3 week block. Then it ranges each semester from 3 to 4 weeks. Some have a speical program when you can utilise the skills learnt in a real setting within another country for just under a month. I'm planning on going to Laos with my uni next year. We will be in a small village which has no health services so will be operating out of a small hut to do health checks on all citizens.
The pracs are generally morning or afternoon starts (ie/7am to 3:30pm or 3pm to 11pm). If there are spots offering night shift, the uni's will have EOI's so only students willing to do them will undertake those.