Claim: John II of Portugal was conceived on March 3rd, 1455.
Evidence: John II -LRB- Portuguese : João II , -LSB- ʒuˈɐ̃w̃ -RSB- ; 3 March 1455 -- 25 October 1495 -RRB- , the Perfect Prince -LRB- o Príncipe Perfeito -RRB- , was the king of Portugal and the Algarves in 1477/1481 -- 1495.