Anyone else think that the US needs to change the primary system so it happens only on one day across the whole country?

It seems like hat would take care of all the media crap that happens, and also allow every state the chance to have their votes count, and not lend a special significance to people from NH etc. I lived in NH for many years and they have weird politics there. Why should we care how that dinky weird place votes anyway? Do it all in one day and lose the hype!