e-day
n.— «She is looking into the possibility of offering an extra Friday program. Coined an E-Day (extra, enhancement or experiment), the course would be offered the Friday that kindergarten students do not have class. Although still in its infancy, Arnebeck envisioned the program as a class of 24 students engaging in hands-on activities.» —“Hibbing School cuts made” by Kelly Grinsteinner Daily Tribune (Hibbing, Minn.) Apr. 14, 2005. (source: Double-Tongued Dictionary)