The utility model relates to a calendar era compass, which is mainly characterized by the inclusion of a mask, a calendar era rotating disc and a base, wherein a reading window is arranged on the face mask, corresponding information of the Christian era, the era of heavenly stems and earthly branches and the Chinese zodiacs is ordered on the surface of the rotating disc, shifting teeth are formed on the circumferential edge of the rotating disc, and the face mask is clipped on the base. Not only the era of heavenly stems and earthly branches is ordered visually and corresponds to the Christian era, and the corresponding information of the Christian era, the era of heavenly stems and earthly branches and the Chinese zodiacs is arrayed and displayed together, but the calendar era compass also has simple and convenient operation, fast search and visual display, thereby providing an ideal tool for searching for corresponding information of the calendar era.