The new national service will cover all 16-year-olds, girls as well as boys, and will be divided into two distinct phases.
The first phase is a mandatory one-month placement with a focus on civic culture, which the government says will "enable young people to create new relationships and develop their role in society".
This includes activities such as charity work, voluntary teaching, or military preparation with the police, fire service or army.
The second phase is a voluntary placement of at least three months and up to a year, in which young people will be encouraged to serve "in an area linked to defense and security" - but again, they could opt to carry out volunteer work linked to heritage, the environment or social care.
It's not quite the program Mr Macron initially had in mind.
When he first floated the idea, during the 2017 race for the presidency, it was a sort of military service in miniature, with all French citizens forced to have a "direct experience of military life" for a minimum of one month between the ages of 18 and 21.
French President Emmanuel Macron attends a ceremony marking the 78th anniversary of late French General Charles de Gaulle's resistance call of June 18, 1940, at the Mont Valerien memorial in Suresnes, near Paris, France, June 18, 2018. REUTERS
That's now been softened and broadened into what's being called a Universal National Service - partly because of concerns that it would cost too much and overburden the country's armed forces.
Even now, the program is estimated to cost €1.6bn a year to run, with €1.75bn of investment up front.
The goal of this new-style national service, the government says, is to encourage young French citizens to take part in the life of the nation, and promote social cohesion.
Consultations will now begin, with a view to rolling out the program from early next year.
But there is still a lot of detail to be hammered out, not least the legal basis.
A working group, set up to look into the scheme, has warned that the French constitution bans the state from forcing an entire section of the population to spend time away from home, except in the case of national defense.
Even before it was announced, 14 youth organizations objected to the "inconsistencies" in the plan, unhappy with the idea of being forced to take part in a project. "Choosing a commitment is just as important as the commitment itself, if not more so," they argued, calling for young people to be able to exercise freedom of choice.
More broadly, about 60% of the population are in favor, according to a YouGov poll carried out in March, although the number dips to just below half when younger people are asked for their views.
Mr Macron is the first French president not to have done military service; it was scrapped for the new intake in 1996, when Mr Macron was 18.
Before that, all young French men were expected to serve for the best part of a year in the armed forces. When the old post-war draft ended, in 1997, there was a collective sigh of relief. Amid the nostalgia, many people here recognized that it had become a social exercise rather than a military one.
Twenty years later, it's that social cohesion President Macron now wants to recapture.
- Israel's compulsory military service is three years for men and two years for women
- Scandinavian countries, Switzerland, Austria, and Greece are among the European countries that still have compulsory military service
- India has never had mandatory military service, even during British rule. It has the world's second largest army, made up of volunteers
- The last time men were called to duty through conscription was 1960 in the UK and 1973 in the US
- Iran has two-year mandatory service for men, though there are exceptions for only sons, doctors and fire fighters, and gay and transgender people