It's a shame to say, but this shows that when ordering stuff for a deadline you always need to pull it forward so suppliers don't realise you have some time in hand.
It happens time and time again.
Suppliers get that date into their mind as "desirable" and then "if possible".
Hope it fits. If there are adjustments to be made after you cruise, that means shipping it off to the other end of the country again.
People who buy sails made in China are risking even more hassle.
Can't see it myself.