Pennsylvania 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, Pennsylvania switches to Eastern Daylight Time (EDT), which is UTC-4.
All of Pennsylvania follows the same time zone. Major cities including Philadelphia, Pittsburgh, Allentown, Erie, and Reading all observe Eastern Time. This makes scheduling across Pennsylvania straightforward, as there's no time difference within the state.
Pennsylvania's Eastern Time position makes it part of the Northeast business corridor. When it's 9 AM in Philadelphia, it's the same time in New York and Boston. Pennsylvania's manufacturing and healthcare sectors coordinate operations across the Eastern seaboard.