LG G4020 - Manual (Page 93)

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Settings
Date & Time Menu 9.2
Set Date (Menu 9.2.1)
Allows you to enter the day, month and year. You can change the date
format via the Date Format menu option.
Date Format (Menu 9.2.2)
YYYY/MM/DD(year/month/day)
DD/MM/YYYY(day/month/year)
MM/DD/YYYY(month/day/year)
Set Time (Menu 9.2.3)
Allows you to enter the current time. You can choose the time format via
the Time Format menu option.
Time Format (Menu 9.2.4)
24 Hours/12 Hours
Auto Update (Menu 9.2.5)
Select On to set the phone to automatically update the time and date
according to the current time zone provided over the service provider’s
network.