74In that regard, it is admittedly true that neither Article 12(2) of Directive 2015/2302 nor point 12 of Article 3 thereof, defining the concept of ‘unavoidable and extraordinary circumstances’, explicitly refers to a requirement that the situation relied on in that regard must, on the date of conclusion of the package travel contract concerned, be unforeseeable and, a fortiori, non-existent. However, the terms ‘unavoidable and extraordinary’ themselves tend to indicate that that concept covers only situations which, on the one hand, did not exist on that date and, on the other hand, were unforeseeable.