Divisions hold meetings that may be attended by any AAS member. The DPS and the DDA each hold one meeting a year separate from the AAS general Meetings. The HEAD and the SPD meet occasionally apart from and occasionally with the AAS. On occasion the SPD has also met jointly with the American Geophysical Union. The Historical Astronomy Division usually meets jointly with the AAS. Schedules for Division Meetings may be found on the Division websites.