Macron is to address the nation from 1800 GMT on all France's major TV channels, the presidency said, in a speech government spokesman Olivier Veran insisted Saturday would be in the spirit of "pacification."
Macron signed the legislation early Saturday, just hours after the banner change to raise the retirement age from 62 to 64 had been validated by the constitutional court, prompting accusations he was smuggling the law through in the dead of night.
Prime Minister Elisabeth Borne vowed Saturday the government would press ahead with more reforms now the pensions overhaul was done.
"We are determined to accelerate" the pace of reforms, she told the national council of Macron's Renaissance party.
After three months of protests and strikes, the left and unions have vowed not to give in and warned of mass protests on the May 1 Labor Day.
As a prelude to the May 1 protests, railway unions are calling for a day of "railway anger" on Thursday.
"I find that the country is anxious and also angry. This anger has to be heard," warned French parliament speaker Yael Braun-Pivet.
Polls have consistently recorded a majority of French opposed to the reform, which the government rammed through parliament using a controversial mechanism to avoid a vote.
Macron's personal popularity ratings have eroded with some analysts suggesting he has given a head start to far-right leader Marine Le Pen down the long path to 2027 elections.
Le Pen said Macron had three choices to end a crisis "which he created himself" -- a referendum on the changes, legislative elections or resignation.