Since 2016, summer time is used permanently in Turkey. With this, Turkey has practically changed the time zone. This changes the time difference between Europe and Turkey to two hours in the winter and one hour in the summer. Smartphones adjust the time automatically, you do not need to do anything extra. Automatic access requires a short access to a Wi-Fi network in Turkey. The same applies to your return to Europe. The time on the smartphone changes automatically after the return, as soon as there is an internet connection.