The American Masters presentation of “LENNONYC” will have a free screening on Oct. 9, which would have been Lennon’s 70th birthday, in New York City’s Central Park. Onstage Sept. 24 to announce the event were New York City Mayor Michael Bloomberg, Lennon’s widow Yoko Ono and Neal Shapiro, c.e.o. of WNET/Thirteen. The screening will be at 7 p.m. (grounds open at 6) at Rumsey Playfield near the 69th Street and Fifth Avenue entrance, rain or shine.“LENNONYC,” written and directed by Michael Epstein and executive produced by Susan Lacy, premiered at the New York Film Festival on Sept. 25 and airs nationally Nov. 22 on PBS. Visit Thirteen.org for more on the Central Park screening.