It's the 1950s

 is a task that first appeared in Celebrity Big Brother 21 (UK).

The Task
The Housemates, complete with 1950s attire, were brought back in time doing gender-specific type of jobs. The male housemates were sent to the factory and given the task to do the factory jobs while the female housemates were given the task to do the housework.

However, unbeknownst to the male housemates, the female housemates were also sent to a secret factory and given the same jobs the male housemates had but it must remain secret throughout and they have to pretend as if they were doing housework all day when the men comes home.

Whoever finished the jobs better will be the winner of the weekly shopping task and will receive the power to nominate.