Hariri went immediately to the presidential palace, it said. Lebanese officials suggested that Hariri could have been forcibly held in Saudi Arabia, but he dismissed these allegations.
Hariri is still expected to return to Lebanon, more than two weeks after his shock resignation from Saudi Arabia.
Lebanon's Prime Minister Saad Hariri has held talks with the Egyptian president on the political crisis triggered by his resignation.
Lebanese Prime Minister Saad Hariri right prays over his father’s grave after his arrival in Beirut
PM Netanyahu meets French President Emmanuel Macron in Paris. Saudi Arabia and Hariri say his movements are not restricted.
Aoun has called Hariri a Saudi hostage and refused to accept his resignation unless he returns to Lebanon.
The Saudi-owned, pan-Arab daily Asharq Al-Awsat alluded to French and Egyptian efforts in a front-page report on Tuesday.
The celebrations are traditionally attended by the president, the prime minister and also the parliament speaker - three pillars of Lebanon's political system, with the president traditionally a Maronite Christian, the speaker a Shiite and the prime minister a Sunni.
Lebanon's outgoing Prime Minister Sa'ad Hariri met Saturday with Macron in Paris after fleeing to Riyadh earlier in the month due to what he said was an assassination attempt on his life.
On Saturday, U.S. President Donald Trump spoke with Macron about the situation in Lebanon and Syria.
Arab League foreign ministers meeting in Cairo on Sunday accused Iran and the Lebanese militant group Hezbollah of destabilising the region.
Paris has intensified its rhetoric over Iran's regional activities. Iran responded by accusing France of taking sides and Macron on Friday said Iran should clarify its ballistic missile program.