You change the time settings in Menu.
To enter time settings in Menu:
In Time you set the time.
To set the time:
In Date you set the month, day and year.
To set the date:
To change the format in which the time is displayed, see Changing units.
In dual time you can set the time for a location in a different time zone.
To set dual time:
We recommend that you set the current time at your current location as the main time because the alarm clock emits alarms according to the main time.
You are traveling abroad and you set the dual time to be the time at home. The main time is the time at your current location. Now you always know the local time and you can quickly check what time it is at home.
In Sunrise you select a reference city that your Suunto Core uses to give you sunrise and sunset times.
To set sunrise and sunset times:
If you want to set the sunrise and sunset times for a location that is not listed in your device, select another reference city from the same time zone. Select the closest city north or south from your location.
You’re hiking in Algonquin, a huge national park north of Toronto. You want to know when the sun sets, so that you know when to start putting up your tent for the night. You choose “Toronto” as your reference sunrise-sunset city. Your now tells you when the sun will set.