"W" Hour

Final remarks to the plan before the "W" Hour, signed by Antoni Chrusciel "Monter" on 1 August 1944 at 9:00 AM.
The appeal issued by the uprising command posted on city streets, 1 August 1944.

"W" Hour, also spelled as W-Hour (Polish: Godzina „W”'), was the codename for the date and time that began Operation Tempest in German-occupied Warsaw, and hence the Warsaw Uprising. The exact time was 5:00 PM on 1 August 1944.