This is a mixer revolving around your student’s birthdate. Have them make one line (for smaller groups) organized by their birthdays in order from Jan. 1st to Dec. 31st. If you have a large group you can have them organize by month. If they do this quickly have all birthdays on an odd day and an odd year get in a group while the evens get in another group. You can come up with different possibilities to get students interacting. The students have to work together and meet other people to make it happen.