How about at the start of a watch cycle, after 3 days off? ATC shift cycles often start with 2 'morning', or early duties. When I started, the shift cycle began with 'afternoons', with a gradual build up to tea-time traffic.
Now, it's usually WANG, straight into the first traffic rotation of the day.
Also, coming back after, say, 2 weeks leave was interesting, especially during summer traffic levels.