When creating an account, the timezone is set to the Dutch time (Europe/Amsterdam) by default. If you often send mailings to, for example, America, it can be useful to adjust the timezone to that timezone so that your emails do not arrive in the middle of the night.
You can do this by following these steps:
Click on 'Settings’ in the menu on the left.
Scroll down until you find the heading 'Timezone' and adjust it to your preference. Then save the changes.