classday
nounUK /ˈklɑːsdeɪ/
US /ˈklæsdeɪ/
A classday is a day when you go to school and have lessons.
Tomorrow is a classday, so I need to pack my school bag tonight.
OTHER MEANINGS
2. A day on which a particular class or course meets.
Our science classday is every Tuesday and Thursday.
3. A day set aside for a class reunion or class celebration.
The alumni returned to campus for their annual classday.
4. A day of special lessons or activities organized for a class.
The teacher planned a fun classday with games and group work.