Australia on Monday granted millions of workers the legal right to "disconnect" from their employers after work hours, thanks to a new legislation.

The new legislation, according to AFP, allows workers to ignore unreasonable out-of-hours contact from employers, and "refuse to monitor, read, or respond to" their employers' attempt to reach them outside of work hours, unless such refusal is considered "unreasonable".

The law, which is similar to regulations in some European and Latin American countries, has been welcomed by unions as a means for workers to maintain a work-life balance.

"Today is a historic day for working people," said Michele O'Neil, president of the Australian Council of Trade Unions. "The union movement has won the legal right for Australians to spend quality time with their loved ones without the stress of being forced to constantly answer unreasonable work calls and emails.

"Australian unions have reclaimed the right to knock off after work."

Prime Minister Anthony Albanese hailed the reform pushed through by his centre-left Labor government.

"We want to make sure that just as people don't get paid 24 hours a day, they don't have to work for 24 hours a day," he told national broadcaster ABC. "It's a mental health issue, frankly, as well, for people to be able to disconnect from their work and connect with their family and their life."

But the reforms got a cool welcome from Australian industry leaders.

"The 'right to disconnect' laws are rushed, poorly thought out and deeply confusing," the Australian Industry Group said in a statement. "At the very least, employers and employees will now be uncertain about whether they can take or make a call out of hours to offer an extra shift," it said.

The law, enacted in February, came into force for medium-sized and large companies as of Monday. Smaller companies with fewer than 15 employees will be covered from August 26, 2025.

Under the law, workers may be ordered by a tribunal to stop unreasonably refusing out-of-hours contact, and employers likewise may be ordered to stop unreasonably requiring employees to respond, it said.

The question of what is reasonable will "depend on the circumstances", the fair work ombudsman said in a statement.

Deciding factors may include the reason for the contact, the nature of the employee's role, and their compensation for working extra hours or being available, it said.

France introduced the right to disconnect in 2017, hoping to tackle the "always on" culture facilitated by smartphones and other digital devices.