Login day is a day that a user logs onto a pirate on an account. Each pirate on an account is separate, logging into one pirate on an account does not cause the other pirates to be charged a login day. A login day covers 24 hours; i.e. logging on three times in one day does not equal three login days. Rank and parlor badges on doubloon oceans last 30 login days.
It is believed that this is how decay for inventory items, such as swords and charts, is calculated as well.
- Spanish article: Día de inicio de sesión