[UNPUBLISHED]

Jackson Quintero Figueroa appeals the district court’s 1 denial of his 28 U.S.C. § 2241 motion challenging the Bureau of Prisons assignment of his Residential Reentry Center placement date. We dismiss the appeal as moot, because Figueroa was released from custody on April 6, 2007. See Calderon v. Moore, 518 U.S. 149, 150, 116 S.Ct. 2066, 135 L.Ed.2d 453 (1996) (per curiam) (when event occurs during pendency of appeal that renders it impossible for court — if it should decide case in appellant’s favor — to grant effective relief, court will dismiss appeal as moot).