San Diego, United States

San Diego uses Pacific Standard Time (PST) at UTC−8, switching to PDT in spring. Sitting on the Mexican border, it shares a timezone with Tijuana but is three hours behind Miami.

A morning standup at 9 AM in San Diego catches noon in New York, 5 PM in London, and 2 AM in Tokyo. Biotech firms and naval operations here frequently bridge Pacific and Atlantic schedules.

San Diego’s concentration of defense contractors, biotech startups, and naval facilities makes it a city where coordinating across global time zones is a daily necessity.