Francis Xavier was born on 7 April, 1506.The TV anime series "Mobile Suit Gundam", aka. "the first Gundam series", started airing on 7 April, 1979.On 7 April, 1952, Tezuka Osamu's manga "Tetsuwan Atom" debuts in Koubunsha's monthly magazine Shonen.
And in the manga, Atom was manufactured by Dr. Tenma on 7 April, 2003.