Why do birds suddenly appear every time you are near? That question and many more will be answered at the Oklahoma City Philharmonic’s Yesterday Once More: A Tribute to the Carpenters. Boasting such smashes as “We’ve Only Just Begun” and “Rainy Days and Mondays,” the iconic sibling pop duo of the 1970s gets its due at 8 p.m. Friday and Saturday at Civic Center Music Hall, 201 N. Walker. Tickets are $15- $65. Call 232-7575 or visit okcphilharmonic.org.