Millions of people will get the right to request flexible working hours under plans the Government hopes will particularly help older workers.
Previously the right was only available to carers or those looking after children, but it is now being extended to all employees.
Under the reforms employers will be obliged to deal with the requests in a "reasonable manner".
Industrial conciliation service Acas has also published a code of practice to help employers understand the new rights and how to process requests for flexible hours.
More top news
A man had a "miracle escape" when his £200,000 Ferrari careered off a motorway and into a field - just an hour after he bought it.
Hundreds of towers across England were discovered to have fire safety flaws including broken fire doors and holes, new figures show.
The Post Office's abandoned underground railway opens its doors on Friday some 14 years after the last letter was transported through it.