Men's Eco Drive Calendrier Moon Phase with month, day of week and date of month calendar (not perpetual), stainless steel case gray tone ion plated, Spherical Mineral Crystal, gray tone ion plated stainless steel crown, stainless steel recessed button (1:00 - used for setting month), stainless steel screw down caseback (little room for engraving), stainless steel brushed and polished bracelet gray tone ion plated push button deployment clasp, black tone dial, rose gold tone skeleton style hour and minute hands with luminous , rose gold tone second hand (no luminous),rose gold tone date of month hand (no luminous), dials for day of the week and month, rose gold tone applied hour indices (no luminous) To set moon, pull crown out one click and rotate clockwise. Rotating crown counter clockwise sets date of month. Pull crown out two clicks to change time and date of week, Press recessed butt.on at 1:00 position to change month setting. As this is not a perpetual calendar, date must be manually changed for months shorter than 31 days. Moon representation is approximate.