Confrimed by the Dutch Ministry of Defence (Ministerie van Defensie) on their website
The 2021 Air Force Days at Gilze-Rijen Air Base will definitely be canceled. The cancellation of a large-scale public event that will attract about 250,000 visitors in 2 days was not easy. The choice is of course the result of the corona crisis. There will also be no alternative interpretation.
Another factor is that many major flying exercises in the Netherlands and abroad were canceled this year. As a result, the Air Force misses many important training courses. As soon as such exercises resume, getting involved is a priority.