In the upper-right portion of Google Calendar, selectSettings(gear icon).

From the menu, chooseSettings.

In the left rail, if the General menu isn’t already displayed, selectGeneral.

Gmail with Google menu displayed.

Under General, chooseTime zone.

In the main display area, underTime zone, selectPrimary time zone.

From the menu, choose the correct time zone.

Time Zone drop down menu, highlighting Alaska Time - Anchorage in Google Calendar Settings

prefs are saved automatically and should be applied in Gmail.