Date Book

* Touring in support of its Grammy-nominated “OK Computer” album, the English rock band Radiohead, right, will be at the Universal Amphitheatre on April 1. Tickets go on sale Saturday. . . . Less Than Jake headlines the multi-act Ska Against Racism tour, which reaches the Ventura Theatre on April 2 and Oak Canyon Ranch in Irvine on April 4. Tickets will be available today for the Ventura show and on Saturday for the Irvine date. . . . Also on sale Saturday: Spacehog, March 13 at the Hollywood Athletic Club; Amy Grant, April 3 at the Universal Amphitheatre; and Power ‘98, a gospel show featuring Fred Hammond and Hezekia Walker, among others, April 11 at the Universal Amphitheatre. . . . Available Friday: Megadeth, April 15 at the Ventura Theatre. . . . On sale Monday: Richie Havens, March 13 at McCabe’s; and Dick Gaughan, March 14 at McCabe’s. . . . Tickets are available now for these shows: Ozomatli, March 11 at Club Caprice in Redondo Beach; Chris Whitley, March 24 at Club Caprice; Gov’t Mule, March 28 at the House of Blues; Enrique Bunbury, April 2 at the House of Blues; and Fobia, April 19 at the House of Blues.