The first flurry of holiday tree lightings sponsored by Mayor Martin Walsh’s office and the Dorchester Holiday Celebration Committee will be held on Sat., Nov. 24. with the first stop in Neponset Circle at 4 p.m. Subsequent tree lightings will happen at Port Norfolk (4:20), Harbor Point (4:40), Rev. Allen Park in Meetinghouse Hill (5), Strand Theatre 5:20, St. Teresa of Calcutta (5:40), Ryan Playground on Dot Ave (6), Fields Corner (6:20), Adams/Kind playground (6:40), Peabody Square (7), and Lower Mills (7:20.)