What implication does changing Juliets wedding day have?

Answer 1

When Juliet is told she must marry Paris on Thursday, she panics and rushes to Friar Lawrence in a panic for help, which may in turn have led him to make the hasty plan of her fake death - which meant he had to rely on a letter being delivered and it never got there.

The setting of the wedding day resulted in the deaths of Romeo and Juliet basically.

The dialogue in Act IV Scene ii where Capulet says he will change the wedding day from Thursday to Wednesday ought to have many implications. It should mean that Friar Lawrence's message to Romeo is useless and that he has to send another and faster messenger. He doesn't even consider this. It means that the guests who have been invited to show up Thursday are going to arrive and find that it was all over, but nobody seems to worry about that. Lady Capulet worries about whether there will be enough food; she needn't worry since there will be no guests. It means that Juliet will take the potion a day earlier but the rescue will not likely come for when she wakes up on Thursday afternoon. She worries about this as a possibility and then dismisses it.

If the wedding day is changed, the characters do not appear to take notice.