Millennium: | 1st millennium |
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The 840s decade ran from January 1, 840, to December 31, 849.
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Year 821 (DCCCXXI) was a common year starting on Tuesday of the Julian calendar.
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 850s decade ran from January 1, 850, to December 31, 859.
The 860s decade ran from January 1, 860, to December 31, 869.
The 870s decade ran from January 1, 870, to December 31, 879.
The 880s decade ran from January 1, 880, to December 31, 889.
The 890s decade ran from January 1, 890, to December 31, 899.
Year 840 (DCCCXL) was a leap year starting on Thursday of the Julian calendar.
Year 842 (DCCCXLII) was a common year starting on Sunday of the Julian calendar.
The 900s decade ran from January 1, 900, to December 31, 909.
Year 844 (DCCCXLIV) was a leap year starting on Tuesday of the Julian calendar.
Year 862 (DCCCLXII) was a common year starting on Thursday of the Julian calendar.
Year 841 (DCCCXLI) was a common year starting on Saturday of the Julian calendar.
Year 848 (DCCCXLVIII) was a leap year starting on Sunday of the Julian calendar.
Year 833 (DCCCXXXIII) was a common year starting on Wednesday of the Julian calendar.
Year 865 (DCCCLXV) was a common year starting on Monday of the Julian calendar.
Year 870 (DCCCLXX) was a common year starting on Sunday of the Julian calendar.