Here’s how it would be in my world:

There would be no such thing as Christmas once a year.  All of the good things about Christmas would be divided evenly by 12 and scattered throughout the year.  (All of the bad things would be divided as well.)

• The poor and hungry are always with us; they would be donated to and thought about all year long.
• People living in institutions, like the Denton State Supported Living Center for instance, live there all year long and would probably enjoy little gifts and visits every month of the year just as much as they do in December; they would get that.
• People would buy gifts for loved ones occasionally just because they happen to see something they know that person needs, or would enjoy; gifts would have more meaning, and the stress of HAVING to find SOMETHING/ANYTHING at a certain time of the year would be eliminated.  And they WOULD find things they wanted to buy because the people who design, create, and market all the things we like to consume would let some stuff out of the box all year long instead of withholding everything until the Consumer Frenzy Season.
• Stores would sell a little more all year long, instead of waiting until “Black Friday” (aptly named for reasons other than the one given, in my opinion) to turn profitable.  We would be able to go to the store for routine purchases in December without having to fight massive crowds and crazy traffic.
• We would still get just as much time off from work and school, and we could still use that time to get together with our families, catch up on whatever, shop, go on vacations, etc.
• The pressure and expectation of having just the right family/life situation would no longer be concentrated and dumped all at once on people who do not have that, causing some to sink into depression – and some even to succumb to despair to the point of just deciding to end it all.
• People who want to enjoy fantasies as the source of good things with their children would still be free to do so if they wished – maybe Santa would come down the chimney on the first of each month in those houses with just one toy for each child, instead of once a year with a whole bag.  And those who want to always tell their children the truth could do that too, still buy nice things for their children, and let the children say “Thank-you!” to the person who actually bought it or made it for them.
• As far as all those lights and decorations – well those are pretty any time of year.  Maybe not snowmen in Arizona (ridiculous) or elves or reindeer, or anything else that makes no sense, but why not have buildings and trees lit up with pretty colored lights to enjoy every evening while we walk about in our less stressed and hurried shoes, buying something maybe or maybe not, and just enjoying the pretty sights?
• Most importantly, for those who really want to celebrate it once a year as Jesus’ birthday, maybe they could start celebrating that at a time of year that approximates the time of year Jesus was actually born on earth, instead of on a co-opted Pagan holiday that originally had nothing to do with him (in fact had some pretty horrifying, evil traditions.)  The ideal of peace on earth, good will towards man could be shouted from the rooftops then, and I believe be more likely to be practiced every day of the year.