The 800s decade ran from January 1, 800, to December 31, 809.
The 810s decade ran from January 1, 810, to December 31, 819.
The 820s decade ran from January 1, 820, to December 31, 829.
The 830s decade ran from January 1, 830, to December 31, 839.
The 840s decade ran from January 1, 840, to December 31, 849.
The 860s decade ran from January 1, 860, to December 31, 869.
The 790s decade ran from January 1, 790, to December 31, 799.
The 780s decade ran from January 1, 780, to December 31, 789.
The 760s decade ran from January 1, 760, to December 31, 769.
The 720s decade ran from January 1, 720, to December 31, 729.
Year 814 (DCCCXIV) was a common year starting on Sunday of the Julian calendar, the 814th year of the Common Era (CE) and Anno Domini (AD) designations, the 814th year of the 1st millennium, the 14th year of the 9th century, and the 5th year of the 810s decade.
Year 840 (DCCCXL) was a leap year starting on Thursday in the Julian calendar, the 840th year of the Common Era (CE) and Anno Domini (AD) designations, the 840th year of the 1st millennium, the 40th year of the 9th century, and the 1st year of the 840s decade.
The 650s decade ran from January 1, 650, to December 31, 659.
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 808 (DCCCVIII) was a leap year starting on Saturday of the Julian calendar, the 808th year of the Common Era (CE) and Anno Domini (AD) designations, the 808th year of the 1st millennium, the 8th year of the 9th century, and the 9th year of the 800s decade.
Year 770 (DCCLXX) was a common year starting on Monday of the Julian calendar. The denomination 770 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 659 (DCLIX) was a common year starting on Tuesday of the Julian calendar. The denomination 659 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 830 (DCCCXXX) was a common year starting on Saturday of the Julian calendar.
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.
