Babe, cograts and Best of luck!
Your parents might come round, the only thing you can do is ask them nicely (

most dads are a sucker for that) If they still won't help, there are plenty of things you can do to get the money together.
Alot can be saved up in a year. OK, it might not buy you the dream wedding, but if you really want to get married on that particular date go for it. Failing that, you could take a loan out.....you'll get the dream wedding and spend years saving to pay for it.
You could always put the wedding back a bit, after all, if you're really destined to be together forever, what does it matter when you get the piece of paper saying so?