One aspect which may be influencing airlines to suggest early resumption dates is good old money. Some folk will see these dates and assume that the airline knows something they don't know and if the price is right (cheap) they may well be tempted, only to find that, further down the line, all they have done is contributed to the airlines' liquidity and they are then left with the unenviable task of trying to get their money back. Caveat Emptor.