The former president has celebrated past birthdays by skydiving near his home in Maine.
Former President George H.W. Bush on Tuesday became the first-ever USA president to reach the age of 94.
Bush is celebrating at his home in Kennebunkport, Maine, as he has in years past, family spokesman Jim McGrath said.
Several of his children are in town, including former President George W. Bush.
Bush's official spokesperson, told The Washington Times that the former president will have a "very low key day with his family, which is perfection as he sees it". He might not be the only former president to hit that mark - former President Jimmy Carter turns 94 on October 1. Two other former US presidents made it to 93: deceased Republicans Ronald Reagan and Gerald Ford.
Another son, Neil Bush, called on people in a newspaper opinion piece to volunteer and "to become a point of light".
Bush has been hospitalized twice following the passing of his wife, Barbara, in April.