To adjust the date, pull the crown to the first position and adjust by turning the crown. Once the date is set, push the crown all the way back to the case. Avoid adjusting the date between 9 PM and 1 AM. The time accuracy is -20 to +40 seconds per day depending on your movements when wearing the watch. To adjust the time, pull the crown to the second position and adjust the time by turning the crown. Once the time is set push the crown all the way back to the case.