Massachusetts operates on Eastern Standard Time (EST) during winter months, which is 5 hours behind Coordinated Universal Time (UTC-5). During daylight saving time, observed from the second Sunday in March to the first Sunday in November, Massachusetts switches to Eastern Daylight Time (EDT), which is UTC-4.
All of Massachusetts follows the same time zone. Major cities including Boston, Worcester, Springfield, Cambridge, and Lowell all observe Eastern Time. This makes scheduling across Massachusetts straightforward, as there's no time difference within the state.
Massachusetts is home to Boston, a major financial and biotech hub. When it's 9 AM in Boston, it's 6 AM in San Francisco and 2 PM in London. The Eastern Time location makes Boston ideal for coordinating with European pharmaceutical partners.