Friday’s service in central Paris will bring together 1,000 people, including President Francois Hollande as well as survivors and victims’ families.
A minute’s silence will be held and the names of all the victims read out.
Attackers with assault rifles and suicide belts targeted a number of sites in the capital. Islamic State later said it was behind the assault.
In a series of co-ordinated attacks on 13 November, the gunmen opened fire on restaurants and bars in the city and stormed a concert hall, where 89 people were shot dead.
Three more attackers blew themselves up outside the Stade de France stadium in Saint-Denis, north of Paris, after staff denied them entry to a football match between France and Germany.
More than 350 people were injured in the attacks – the worst in recent French history.
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‘Not enough done’
During Friday’s service at the Invalides complex, President Francois Hollande will address the victims’ families.
He has asked citizens across the country to “participate by decorating their homes with the blue-white-and-red flag”.
“We have tried to suggest something that will let every French person take part in Friday’s ceremony,” government spokesman Stephane Le Foll said.
However, not all the victims’ families have accepted the invitation to attend the service at the grand complex that houses a military museum and Napoleon’s tomb.
The family of one victim told French media they had refused, saying not enough had been done to protect the nation in the wake of other attacks here earlier this year.
At least nine people are believed to have been directly involved in carrying out the attacks.
They are all dead, but two more men, including suspect Salah Abdeslam, are still on the run as a huge manhunt continues in France and Belgium.
Some of the attackers – including suspected ringleader Abdelhamid Abaaoud, who died in a police raid in Paris last week – had lived in Brussels.