Today is Ellsworth Kelly’s 90th birthday! In just three weeks, we open Ellsworth Kelly: Panel Paintings: 2004-2009, joining a host of sister institutions in celebrating the milestone birthday year of this acclaimed artist. Early this month, Philadelphia’s Barnes Foundation opened Ellsworth Kelly: Sculpture on the Wall. Just last week MoMA put on view the artist’s Chatham Series, reunited for the first time since 1972. A few days later a retrospective of Kelly’s prints opened at the Detroit Institute of Arts. Here in town the National Gallery of Art is showing a series of luminous handmade paper images that the artist made in 1977. Happy birthday Mr. Kelly!