How many time zones does Alaska have?
Alaska has two time zones: Alaska Time Zone (UTC-09:00 standard and UTC-08:00 daylight saving) and Hawaii-Aleutian Time Zone (UTC-10:00 standard and UTC-09:00 daylight saving). The latter is used only by islands on the Aleutian chain that are west of 169°30′W.
Instruction: How many time zones does Alaska have?
Context: 
Response: Alaska has two time zones: Alaska Time Zone (UTC-09:00 standard and UTC-08:00 daylight saving) and Hawaii-Aleutian Time Zone (UTC-10:00 standard and UTC-09:00 daylight saving). The latter is used only by islands on the Aleutian chain that are west of 169°30′W.