Ducati MONSTER 1200 Owner's Manual page 181

Day setting
Select "DAY" option, by pressing button (1) or (2).
DATE SETTING
Once option is highlighted, press button (4).
Day value starts flashing.
YEAR
Press button (1) to decrease day value by 1 unit: 31,
2015 / 06 / 23
30, ... 01, 31.
MONTH
Press button (2) to increase day value by 1 unit: 01,
DAY
02, ... 31, 01.
Once you reach the value to be set, press button (4)
EXIT
and the set day will stop flashing.
Fig. 104
180