Lets put it this way:
You sent out wedding invitations to hundreds of people for 4th of October, worldwide.
These people arranged a day off to attend your wedding that specific day and invited their +1 as well as arranged care for their little kids.
Then one single guest says they can't attend on 4th but is happy with 2nd October.
Now, do you contact hundreds of your guests worldwide to change plans for that single guest?