On Sundays and public holidays, it is forbidden to trade and perform activities related to trade in commercial establishments, as well as entrusting an employee or an employed person (including a person working in a commercial establishments under a civil law contract, such as a contract of mandate) to perform work in trade and perform activities related to trade. This prohibition does not apply in the cases specified in the Act.

The prohibition applies to Sundays and public holidays which are understood as:

• January 1 – New Year's Day,
• January 6 – Epiphany,
• the first day of Easter,
• the second day of Easter,
• May 1 – National Day,
• May 3 – National Day of the Third May,
• the first day of Pentecost,
• Corpus Christi day,
• August 15 – Assumption of the Blessed Virgin Mary,
• November 1 – All Saints,
• November 11 – National Independence Day,
• December 25 – the first day of Christmas,
• December 26 – the second day of Christmas.

The law defines the number of trade Sundays, i.e.:

1. the next two Sundays preceding Christmas Day;
2. the Sunday immediately preceding the first day of Easter;
3. the last Sunday in January, April, June and August. However, if there is a holiday on the last Sunday in January, April, June or August, then the trade prohibition applies.

The National Labor Inspectorate was entrusted with the control of compliance with the provisions of the Act on the restriction of trade on Sundays and public holidays and on certain other days.

Restricting trade on Sundays is an important social issue. It can lead to the strengthening of social bonds, in particular family ties. Mothers constitute a significant group among those employed in retail, and Sunday is often the most convenient time to spend time with children and family. A work-free Sunday gives all family members the opportunity to spend time together and restores the original purpose of the day.