Free calculator to get the number of hours, minutes, and seconds between two times. Also, a full version to calculate the time duration between two dates. World time and date for cities in all time zones. International time right now. Takes into account all DST clock changes. The meaning of HOUR is a time or office for daily liturgical devotion; especially : canonical hour. How to use hour in a sentence. An hour is a unit of time — it's sixty minutes, 3,600 seconds, or the length it takes the long hand on your watch to move in a full circle.
