Good luck with that upgrade.

Yes, there are rules, as established by EU 261/2004:
http://ec.europa.eu/transport/passengers/air/air_en.htm

However, since this isn't until June, you aren't entitled to compensation. You could get a refund and cancel, though.

Your best bet is to try to look at flight schedules to see if there is another option that you could suggest for rebooking that would better meet your needs.