The notice period is the time period between the receipt of the letter of dismissal and the end of the last working day. This time period has to be given to an employee by their employer before their employment ends. It also refers to the period between resignation date and last working day in the company when an employee resigns.
In the United Kingdom the statutory redundancy notice periods are:
These statutory periods constitute the minimum notice period to be given by the employer, however, some employers may opt to give employees longer notice periods, in order to give the employees a better opportunity to find alternative employment.[note 1]
In Poland the same notice period applies regardless which party (employer or employee) withdraws the contract. The statutory periods apply, unless both parties agree on other terms:
The week-measured period ends on Saturday. The month-measured period ends on the last day of calendar month - for instance, if 1 month period applies, a resignation or dismissal produced between 1st and 30 April results in contract termination on 31 May.
Because most employment in the U.S. is at-will, no notice period is required. In practice, most employees provide two weeks' notice.
The notice periods for the white collar workers are defined in the "Funktionærloven"  in Denmark which are:
If the employee resigns, he/she has to give 1 month notice period