The alarm watch includes a mechanical movement, which drives a time display mechanism including at least a first hour hand (17) and a first minute hand (13) mounted above a first dial. The alarm watch also includes an alarm mechanism able to release an alarm at a predetermined alarm time, manually determined every twenty-four hours, and a mechanism for displaying the predetermined alarm time. The alarm time display mechanism includes at least a second hour hand (33) provided for displaying the alarm time in twelve hours, and an indicator (52) with two positions provided for specifying whether the alarm time is situated between midnight and midday (AM) or situated between midday and midnight (PM).