Zero day(s) may refer to: 0th day
Computing Zero-day (computing), a software vulnerability unknown to those who should be interested in its mitigation Zero Day Initiative, an international software vulnerability initiative Zero-day warez, copyrighted software that is cracked on the same day it is released
Film and television Zero Day (film), a 2002 American film by Ben Coccio Zero Days, a 2016 American documentary film Zero Day (American TV series), a 2025 American political thriller series Zero Day (Taiwanese TV series), a 2025 Taiwanese speculative fiction series "Zero Day" (My Adventures with Superman), a 2023 TV episode "Zero Day" (Person of Interest), a 2013 TV episode
Literature Zero Day (novel), a 2011 thriller novel by David Baldacci Zero Day, a 2011 novel by Mark Russinovich Zero Days, a 2023 novel by Ruth Ware
Music Zero Day (album) or the title song, by MC Frontalot, 2010 Zero Days (album) or the title song, by Prong, 2017
See also D-Day (military term) Day Zero (disambiguation) Zero Hour (disambiguation)