Some International Longshore and Warehouse Union Locals are choosing to observe the Juneteenth federal holiday on June 20, the labor organization announced this week. As part of their contract, the 30 ILWU locals are allowed to take one stop-work meeting every month as long as employers get advanced notice. This month, dockworkers at the ports of Long Beach, Los Angeles, Oakland, Seattle and Tacoma plan to use the stop-work meeting during the day shift to commemorate the end of slavery in 1865. Work will resume with the evening shift, the ILWU said. “I am incredibly proud of my union’s history…