The 800s decade ran from January 1, 800, to December 31, 809.
The 820s decade ran from January 1, 820, to December 31, 829.
The 870s decade ran from January 1, 870, to December 31, 879.
The 780s decade ran from January 1, 780, to December 31, 789.
The 710s decade ran from January 1, 710, to December 31, 719.
The 700s decade ran from January 1, 700, to December 31, 709.
The 630s decade ran from January 1, 630, to December 31, 639.
The 640s decade ran from January 1, 640, to December 31, 649.
The 650s decade ran from January 1, 650, to December 31, 659.
The 660s decade ran from January 1, 660, to December 31, 669.
The 670s decade ran from January 1, 670, to December 31, 679.
{{Dec adebox|68}} The 680s decade ran from January 1, 680, to December 31, 689.
The 690s decade ran from January 1, 690, to December 31, 699.
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.
Year 683 (DCLXXXIII) was a common year starting on Thursday of the Julian calendar. The denomination 683 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.
Year 685 (DCLXXXV) was a common year starting on Sunday of the Julian calendar. The denomination 685 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.
700 (DCC) was a leap year starting on Thursday of the Julian calendar, the 700th year of the Common Era (CE) and Anno Domini (AD) designations, the 700th year of the 1st millennium, the 100th and last year of the 7th century, and the 1st year of the 700s decade. As of the start of 700, the Gregorian calendar was 3 days ahead of the Julian calendar, which was the dominant calendar of the time.
Year 640 (DCXL) was a leap year starting on Saturday of the Julian calendar. The denomination 640 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.
Year 656 (DCLVI) was a leap year starting on Friday of the Julian calendar. The denomination 656 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.
Year 658 (DCLVIII) was a common year starting on Monday of the Julian calendar. The denomination 658 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.
