From Wikipedia, the free encyclopedia
1721 (MDCCXXI) var sambært gregorianska kalendaranum eitt vanligt ár, ið byrjaði á einum mikudegi, og sambært julianska kalendaranum eitt vanligt ár, ið byrjaði á einum sunnudegi.
Árstal |
1718 1719 1720 – 1721 – 1722 1723 1724 |
Áratíggju |
1710-árini – 1720-árini – 1730-árini |
Øldir |
16. øld– 17. øld – 18. øld |
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