Time in Boston, United States

Boston, United States runs on UTC-4 — written as EST (Eastern Standard Time). That offset is what the live clock at the top of this page uses, so the time you see always matches the real local clock in Boston.

Yes — Boston shifts its clocks for daylight saving, so the offset moves by an hour between summer and winter. The clock above already accounts for it and always shows the time Boston is actually keeping today.

The fastest way is a converter: pick your own zone and you’ll get the matching Boston time instantly, for any date. You can also open the full EST conversion list to compare Boston against every other zone.

The big clock at the top updates every second, so you can leave this page open and glance at it. Running an event or watching a launch from afar? Tap the fullscreen icon to throw the Boston clock onto a big screen.

It’s calculated from the IANA time zone database — the same source your phone and computer rely on — not a fixed number that drifts when the rules change. So the Boston time here stays correct through daylight-saving switches and into the future.