Companies must prepare the work calendar every year. It is advisable to have it ready so that employees can consult it from January. In this regard:

• They must display it in a visible place at the workplace (for example, on the notice board) or make it available to the staff through electronic means such as the intranet. If a company fails to comply with this obligation, it will be committing a minor offense, punishable by fines ranging from 70 to 750 euros.
• If the company has workers' representatives, they have the right to be consulted and to issue a report prior to the final preparation of the calendar. In this sense, even if they disagree, the company may proceed to prepare it unilaterally (the law does not require reaching an agreement; only consulting them). Therefore, it is advisable to draw up minutes of the meetings to be able to prove that they have been consulted on the content of the calendar.
• The law does not establish what content the calendar should include. If the applicable agreement does not regulate this matter (some detail how it should be prepared or even which days are non-working), it will be sufficient to include the working days and holidays in the company. It is not mandatory to include the schedules or specific shifts of each employee.