Yes, to specify any particular day as a company wide holiday, go to the “Working Day Calendar” in your Settings menu. You can specify any day as a holiday simply by clicking on the date. To change it back to a standard working day, just click again. The calendar is automatically populated with the national holidays of the country that you chose during account setup. If your company does not observe these holidays, you can just click on the date to change it to a standard working day.