You can have as many birthdays as you want. It's true. In fact, you're alive, and that means you can do anything you want.
I invented a birthday. Because I can. And I managed to convince a lot of people. And I even freaking celebrated it.
The idea dawned on me earlier this year on my former birthday. I was thinking about how much I loved my birthday, and how it's always the best day of the year. That's when realized I could have more of them. As many as I wanted.
Like Santa, or God, or Spacetime, or the Law, or the chair you're sitting on, or birthdays only exist as long as people believe they do. It's entirely a social construct.
First of all, you have absolutely no reason to believe any particular day is my birthday other than 1) I told you so, 2) some people I know told you so, and 3) some websites and pieces of paper I own and control tell you so. All easily manipulated sources. And thus, I manipulate.
In fact I have no reason to believe I was born on any particular day for the very same reasons. I even have no reason to believe in the passage of time. Right now is always my birthday. I just came into existence. Hey guys.
People change their names all the time. Legally, even. In fact, just calling yourself a different name counts as a name change legally in Massachusetts. Now, I'm not about established social orders, especially those that inhibit the progression of the free spirited artists of life. But there even exists a freaking written law flexible enough to allow people to change "facts" deeply rooted as their own name by merely willing it so. Birthdays are just the next step.
Birthdays could've been celebrated over any period of time. A year? What is that? The orbit of the Earth around the Sun. So what. If the designers of the Calendar had worshiped the Moon, we'd be having a lot more parties.
Basically, what's going on is some decision some people made thousands of years ago is inhibiting my ability to have fun.
Answer: birthday liberation.
And I encourage everyone to take action. In the name of awesomeness.
For this to work, above all, you have to believe. And you may very well have incredible birthdays all on your own. But if you want to take this to the next step, you need everyone else to believe. The easiest is blatant misinformation (or rather ultraneotruthiness) -- for the conservative, sun-worshipping, one-birthday-per-revolution-of-the-earth-around-the-sun types. You tell people "oh yeah my birthday is august 9th". You change your birthday on social networking sites. You send out invitations to a birthday party you're throwing on your new day. You'd be surprised how many people you can fool.
Of course, your close friends and people who have known you a while will catch on. These are the people that must listen to our gnosis. For the open minded, liberate their conservative, outdated birthday views. For the people who care about you, a will to follow your passion ought to be enough. For not so easily converted, show them what they're missing out on. For further reading consult 1984.
The trick is to throw a massively awesome birthday party. People will do anything wacky in the spirit of a good party. Even believe it's your birthday!
Cake, candles, birthday songs, whatever birthday traditions or creations of your own you can throw in will help further propagate the reality.
Unless the majority of your attendees are hardcore birthday liberationists, you probably shouldn't ask for presents. This might be a turn off to the unconverted. An excuse to get more presents isn't the point anyway. Instead, in the spirit of tradition, ask for birthday cards. Custom made cards. Supply the materials even. Later, if anyone doubts your birthday, you show them all the cards as proof.
Although, if you convince people to consistently bring you awesome presents on your birthdays, you've pretty much won at life. This is probably likely if you're able to form a circle of birthday-liberationists.
Significance - You might fear of having too many birthdays. You fear they would become less significant, either to you or everyone else. You fear you will miss the anticipation. While a possibility, anticipation and significance still exist entirely inside of you, and can be controlled. Perhaps you need to find the right balance. Just think about how awesome you are. The very fact you are going against everything everyone believes in and celebrating your own created birthday should manifest incredible significance. Think about a world where people are no longer chained down by birthday norms. Think about how your actions are spreading happiness to everyone.
Everyone else - If your ideals do not catch on with others, don't lose faith. It may just take some warming up. Keep the spirit alive inside you.
Yourself - You're the main person here that makes this all true. As soon as that Monobirthdayist propaganda creeps back into your head, you're brainwashed, and the dream disappears. Fight it, realize you determine reality.
Age Increment - You can choose to change your age number to anything you want. Imagine being the first person to reach age 300
Negative Birthday - Too old? Not a problem, you can fix that. Miss your earth-around-the-sun age, but still want have tons of birthday parties? Throw in a few negative birthdays.
Fewer Birthdays - Inconveniently have birthdays less frequently, because of existentialism.
Legal Documents - Super awesome points if you can get these changed. You could even make it a tradition to burn your old birth certificate.
Whatever else you want - Blow people's minds
Go forth! Take action. Throw an awesome birthday. Liberate people's minds. Spread the word, paste the URL, make this dream a reality for everyone.