There is a list of special days on the schedule page under SPECIAL DAYS. Here you can set how Web Port should classify holiday eves and holidays.
To change a classification click on the desired special day and change how Web Port should handle that day in the dialog that opens.
Special days are read from the file default-specialdays.csv which is available in the Web Port project under assets/config/schedule. If that file is missing, Web Port will calculate specialdays according to Swedish standard days.
The button Reset to default in the toolbar will reload the special days configuration from the file or recalculate them, so any manual changes done on special days in Web Port will be overwritten.
The Date column in the list shows the date on which the special day occurs this year. Web Port automatically calculates when holiday eves and holidays occur during the year unless default-specialdays.csv is available.