When you prepare your event invitation you may see information in curly brackets {} for example:
{event_name}, {event_date}, {event_time} [{event_timezone}].
This information is generated by the system automatically for each event and inserted into your email. Please do not change any text inside the curly brackets.
You may delete the information in curly brackets if you do not need it, make sure that you delete the open curly bracket { and close curly bracket } and all the text between them.