We work on Saturdays and have a day off in lieu during the week.

我们每周星期六上班，用其他的日子补休一天。

《牛津词典》

He worked on Sunday, so he took Monday off in lieu.

我每周六休息（不上班），所以这份工作还不错。

youdao

Many employees are forced to take unpaid days off in lieu of a pay cut or layoff.

许多员工被迫无薪休假，以替代减薪或解雇。

youdao

Officers who work bank holidays without eight days notice get double pay plus a day off in lieu.

ECONOMIST: Police pay

The next 100 hours would have been taken as time off in lieu.

BBC: Rolls-Royce workers reject deal

Members of the train drivers' union Aslef are planning a 24-hour walkout on Sunday, claiming they should be given three extra days' pay and a day off in lieu for working the bank holiday.

BBC: Tube strike: Boxing Day walkout 'could harm retailers'