Forgotten Realms: Classic
Calendar of Harptos
The Calendar of Harptos was the calendar used in nearly all of Faerûn. It was created by the wizard Harptos although most people associate the word ‘Harptos’ with the calendar. It was split into twelve months, each lasting three tendays (or thirty days). There were an additional five days that fell between months, bringing the total number of days in most years to 365.