Year 740 (DCCXL) was a leap year starting on Friday of the Julian calendar, the 740th year of the Common Era (CE) and Anno Domini (AD) designations, the 740th year of the 1st millennium, the 40th year of the 8th century, and the 1st year of the 740s decade. The denomination 740 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
