Companies around the world are experimenting with a four-day workweek. Shake Shack, for example, has extended its pilot program due to its astounding yield of workplace positivity and efficiency.

To be clear, this does not mean that the restaurant is only open four days a week, or that its employees work fewer hours than normal. It simply means that the standard 40-hour workweek is condensed into four days instead of five. For store supervisors, this means not having to pay for an extra day of childcare, increased efficiency, and a more positive workplace. The fiscal and lifestyle benefits to a four day work week have helped Shake Shack set themselves apart from their fast-casual competitors in terms of recruiting opportunities.

The fast-casual dining industry tends to experience difficulty in employee retention and dedicated long-term team members. For companies such as Shake Shack, it is hard to find top tier talent at the same pace the chain is expanding. Thus, perks such as a four-day workweek serve the company in standing out amongst the many fast-casual restaurants that talented employees have to choose from. It draws more talent to their applicant pools.

Other restaurants have adopted various incentives to improve employee retention rates and cultivate positive work environments, such as cash bonuses, tuition reimbursement, and comprehensive insurance coverage. However, it seems that the four-day workweek is a long-term solution that mutually benefits individual workers and the company at large.

Though there is no official plan for a nationwide rollout quite yet, Shake Shack is extending its trial period. Currently, about one-third of stores have implemented the four-day workweek in major cities such as Las Vegas, Dallas, San Antonio, Detroit, and L.A. With enormously positive feedback from managers thus far, the company plans on expanding the program with the hopes of investing in employee retention and leadership development.