Expedition 42 Spacewalks Postponed by a Day

Updated Dates Announced for Space Station U.S. Spacewalks, NASA
“Space station managers decided Thursday to move the first two spacewalks by NASA’s Expedition 42 Commander Barry “Butch” Wilmore and Flight Engineer Terry Virts by one day because of added analysis of spacesuits they will wear.”
NASA ISS On-Orbit Status 19 February 2015, SpaceRef
“Extravehicular Activity (EVA) Preparation: The USOS crew members performed final preparations for the upcoming EVAs. Today, they reviewed the detailed EVA timeline, briefing package, and crib sheet then completed final tool configuration.”