8.5 Hours is a 2008 Irish drama film written and directed by Brian Lally. The film tells the story of one frantic day in the lives of four Dublin software workers during the final months of Ireland's Celtic Tiger boom years. The film stars Lynette Callaghan, Art Kearns, Victor Burke and Jonathan Byrne. The film won several awards on the Irish film festival circuit, including Best Irish Feature Film at the International Film Festival Ireland in Clonmel (2009), Best Actress award for Lynette Callaghan at the Yellow Fever Independent Film Festival in Belfast (2009) and was awarded 2nd place in the Best Feature category at the Waterford Film Festival.

The film went on a limited Irish cinema release in January 2010 and was released on DVD throughout Ireland in November 2010. It was released on DVD and VOD in North America by the American distributor Breaking Glass Pictures in March 2011. The film was the first feature produced by the Irish production company Instigator Films.