We recommend sending out graduation party invitations 3-4 weeks in advance. If you send out your party invitations too early, they'll get lost in the shuffle over time. If you send them out too late, your guests are more likely to have scheduling conflicts. Graduation parties are usually held in May, June, and July, and many people will have vacations and other events lined up throughout the summer. Check out our complete guide to hosting a party for some tips on sending out invitations.