via Google Translate:
The world is upside down. Nevertheless, it is also important to look ahead at Messe Friedrichshafen. Since the decision to postpone AERO Friedrichshafen, which was planned for the time period April 1 to 4, 2020, due to the influence of the coronavirus, many considerations have been made about moving to a later date. With the result that the next edition of the leading trade fair for general aviation will take place on April 14-17, 2021will be held. "Neither the calendar of Messe Friedrichshafen nor the dates within the industry would have allowed a smooth postponement to the summer or autumn of this year. After weighing up all pros and cons, we see an appointment in 2021 as the only sensible and viable option for the entire industry
, ?explains AERO division manager Roland Bosch the decision.