Cette page concerne l'année 421 du calendrier julien.
418 419 420 421 422 423 424 Décennies : 390 400 410 420 430 440 450 Siècles : IIIe IVe Ve VIe VIIe Millénaires : -IIe -Ier Ier IIe IIIe |
L'année 421 est une année commune qui commence un samedi.
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