Upvote:7
All airlines are free to move or cancel flights if they want. They normally don't do that for fun, as they lose a lot of money, and anger customers, but there is no law that forces them to fly as originally scheduled.
You are at minimum entitled to either an alternative connection, or a full reimburs*m*nt; if you don't like the new flight connection (or they can't provide one), you get your money back.
Depending on the location of your departure airport and/or the airlines home country, there might be additional legal rights for you; especially if the change or cancellation happens on short notice, or if it leaves you stranded in another location/country. Otherwise, you get at best your money back, and that's it.