When a public holiday falls on a weekend (e.g. Saturday or Sunday), the following working day (e.g. Monday) turns into an official day off too.
If only one or only two working days are between a public holiday and another day off then the Cabinet of Ministers of Ukraine usually releases a recommendation to avoid this gap by moving these working days onto a certain Saturday (that is to have uninterrupted vacations, but to compensate this by work on another day which would be a day off). Usually such recommendations only concern those employees whose weekly days off are Saturday and Sunday.