TMDb/Star Trek: Starfleet Acad TV Discover the new Federation holiday, All-Worlds Day, in Star Trek: Starfleet Academy. Cadets face unique challenges as the academy empties for this first-of-... March 18, 2026 AceShowbiz - Star Trek: Starfleet Academy has introduced a brand-new holiday to the expansive Star Trek canon in its seventh episode titled "Ko'Zeine.