(This feature is in development.)
Open your calendar by either using the button on the profile window or through the Writing Desk. Your calendar shows you invitations and events, using both "game time" and "real time". If you have accepted or offered an invitation to another player the event will appear on your calendar.
Press the watch icon on the upper right of the calendar to turn on the current time in addition to the game historical time.
Click the turned page icons on the lower right and left sides of the calendar to go backwards and forwards in time.