"I hope the new Gregorian calendar year will be a year full of peace and tranquility for all humans," Rouhani said in his Monday message addressing world leaders.
He also expressed hope that the world would witness increasing welfare and prosperity through joint efforts.
The Iranian president wished world leaders and nations success and health in the new year.
In his message to Iranian Christians, Rouhani expressed hope that the world would see the promotion of peace, justice and the eradication of any kind of immorality and discrimination in the New Year.
He also hoped that all Christians and followers of other divine religions would live together in Iran with full success and happiness.
The birthday of Jesus Christ has brought the message of spirituality, peace and friendship for all societies, especially his followers, the Iranian president said.