Biedronka employees could find themselves working between 00.15 and 05.45 on Mondays when the Sunday trading ban kicks in this March.
According to Gazeta Wrocławska, the budget supermarket chain are planning to have staff prepare and maintain their stores overnight following Sundays when the trading ban applies.
The trading ban, which will be active every other Sunday as of March, is the result of pressure from members of the Polish Catholic Church and the Solidarność trade union. It was voted into law by the Polish Parliament late last year.
In 2019 large supermarkets and large shops will be closed 3 times per month, with a total Sunday shutdown (bar some special exceptions) planned for the following year.
Solidarność leader Piotr Duda has even said he will campaign for all but essential services to be closed on Sunday. Such a move would mean that pubs, restaurants, cinemas, theatres and countless other businesses keep their doors shut on Sundays.
Biedronka believe that special nightshifts may be required in order to clean and tidy their stores, as well as preparing them for the arrival of new products and offers.
The plans have angered Solidarność, who believe Biedronka's nightshifts are illegal. They claim that a 'day' in working terms is defined as being between 06.00 and 06.00 the following day.
However, Gazeta Wrocławska state that the law on Sunday trading also changed the definition of a 'day' in relation to work. It is now exactly the same as the clock and calendar, meaning 00.15 on Monday is treated as Monday according to labour law.