The timezone WST in Samoa

Timezones are always computed by their difference to UTC, the "Universal Time Coordinated". In Samoa exists only a single tonezone at UTC+13. E.g. New York is currently at UTC-4 in Eastern Time, so the time difference between NY and Samoa is 17 hours.

They have a nationwide clock change from standard time to daylight saving time, where the clocks are switched forward by 1 hour in summer.

Back to overview: Samoa

Only 1 nationwide time zone

UTC	+13
Standard time:	West Samoa Time (WST)
Daylight saving time:	West Samoa Daylight Time (WSDT)

Samoa has an east-west extension of 1.1 degrees of longitude. Given the country's location in Polynesia, this corresponds to about 120 kilometers. With such a small extent the course of the sun at different positions in the country hardly matters. The position of the sun in the west of the country deviates from that in the east only about 4 minutes. This means the sun rises and sets 4 minutes later in the west than in the east.
Timezones

Sunrise and sunset in SamoaTimes of sunrise and sunset for the most important cities in Samoa and the avg. length of daylight per month

All Countries with DSTA summary of all countries which currently observe Daylight Saving Time with further info on introductions and upcoming changes.

Population growth in SwedenPopulation growth of the last 60 years in Sweden compared to the global average