Quartz watches with calendars: Remove the white time setting from the crown → Pull the crown to position 1 → Adjust the calendar → pull the crown to position 2 to adjust the time → return the crown to its original position. No calendar: Pull out the white time setting at the crown → Pull out the crown → Adjust the time → return the crown to its original position. Mechanical watch 0 position: Wind (20-30 turns clockwise) 1 position: Adjust date 2 position: Adjust time → Push back to 0 position to lock. Press and hold the crown of the smart watch for 3 seconds to turn it on → the mobile phone App automatically calibrates the time → The crown is only used for restarting/shutting down, no need to remove the hands. Calendar, Day of the Week, and Moon Phase Adjustment: 21:00-03:00. No adjustment is allowed. The moon phase dial is in the day-changing transition stage, and the teeth are prone to wear. 2. It is recommended to operate during the safe period from 04:00 to 20:00. First, confirm the current moon phase window form (full moon/new moon). 3. Quick Calibration (Recommended) ① Pull the crown to position 2 (time position) ② Turn the hour hand clockwise to move the moon phase dial forward to the "full moon" position ③ Continue to turn to the actual moon phase. The number of days required: every 24 hours = 1 moon phase position ④ Push the crown back to position 0 (for mechanical watches: wind 20 more turns to replenish power) 4. When locking the screw-down crown, tighten it until it feels slightly obstructed to ensure the 30-meter water resistance takes effect. Note: When the month has less than 31 days, you need to manually adjust the calendar to the 1st.