Most South Pacific islands don’t utilise daylight savings time, except for Fiji and Samoa. Double-check your airline tickets if you're winging in or out at the start or finish of daylight savings.
The International Date Line splits the South Pacific in half – running along the 180-degree longitude but detouring to the east to catch Tonga, Kiribati, Samoa and Tokelau in the same day – which makes time zones here complicated. Flying east across the International Date Line, you'll arrive at your destination before you left! Crossing from east to west, you'll lose a day.