Nocturne Halloween combines large original clock numerals, a softly lit decorative moon and three data fields of your choice. It is designed for AMOLED and MIP displays. The decorative moon changes with local time in four states: a quarter disc from 00:00 to 05:59, half from 06:00 to 11:59, three quarters from 12:00 to 17:59, and the complete disc from 18:00 to 23:59. A faint outline remains visible throughout. It uses the normal clock update and makes no extra measurements. It does not represent the astronomical lunar phase. The outer ornament also shows the passage of the day. At 00:00, its separate arcs, dots and four markers are gray. The accent color moves clockwise through one 24-hour cycle; by 23:45, every element is colored. Only the existing elements change color: the edge never becomes a solid circle or shows steps, battery level or another metric. Customize the face in Connect IQ settings: • Accent color: pumpkin orange (default), purple, lime, cyan or yellow. • Accent outline around the time: on by default; can be turned off. • Data icons: accent-filled by default or accent outlines. • Three independent fields: Body Battery, stress, heart rate, steps, running or cycling VO₂ max, calories, floors climbed, intensity minutes, recovery time, respiration, notifications, temperature, sleep score or Pulse Ox. • Watch battery beside the date: percentage or estimated days remaining. The time follows the watch's 12- or 24-hour setting. Long values are shortened for legibility; for example, 10,500 steps appear as 10.5k. Unavailable values appear as --. On supported watches, tapping the date, battery or a data field opens the corresponding widget when that widget is available. On AMOLED watches, the low-power view shows only the time in a thin outline when the watch's own always-on display setting is enabled. There is no additional watch-face switch. Sleep score and Pulse Ox depend on data and support provided by the watch; the face does not start measurements.