San Francisco is 3 hours behind Baltimore. Baltimore uses Eastern Time (ET, UTC-5/-4) while San Francisco uses Pacific Time (PT, UTC-8/-7). When it's 12:00 PM in Baltimore, it's 9:00 AM in San Francisco.
Both cities observe daylight saving time on the same schedule, so the 3-hour difference remains constant year-round.
Best calling time: 12:00 PM - 5:00 PM Baltimore time. This corresponds to 9:00 AM - 2:00 PM in San Francisco, covering morning to early afternoon business hours on the West Coast.
Baltimore and San Francisco are both important port cities with strong tech and healthcare sectors. Johns Hopkins in Baltimore and the Bay Area tech companies often collaborate on biotech and medical technology research.