Hundreds of workers at food firm Kellogg's are being offered the chance to finish work at noon on Fridays under a "summer hours scheme".
The 420 staff based at the company's head office in Salford will be able to leave early, starting this week, provided they have completed their contracted hours.
Kellogg's said the initiative, which runs until September, will actually improve productivity and give staff the flexibility to have a long weekend break.
Sue Platt, Kellogg's UK human resources director, said: "Flexible working is something we take very seriously at Kellogg's and we encourage all our UK office-based employees to make the most of the summer hours scheme.
"Research shows people who feel they have a good work-life balance work 21% harder than those who don't.
"Summer hours is part of a package we offer to ensure we provide work-life balance opportunities to all employees."