Hexoskin Dashboard is synchronized with your computer's clock. Therefore, you need to change the time zone on your computer. The change should be effective immediately.
Please note that all Hexoskin data are timestamped (date and time) and based on the Unix (or Posix) time (number of seconds that have elapsed since January 1st, 1970 at 00:00:00 GMT). So if you travel and switch between time zones, your data will always be dated properly.