This document is a comprehensive planning guide for the 128th Founders Day event of Tri Sigma, a National Panhellenic Conference Sorority. It provides detailed instructions and resources for organizing the event, including a timeline, checklist, promotional materials, and sample documents such as invitations, programs, and press releases. The guide emphasizes the importance of community, tradition, and giving back, with a focus on celebrating the sorority's history and fostering connections among members.