Are you doing anything special for today?
I put blue lightbulbs in every outdoor light. (I chose blue because it's the color that's out there and it gets attention -- not because I'm pushing any group, just wanted to be clear LOL) I'm of the opinion that any awareness opens the door for conversations and education, and I'll take it over non-awareness. I can do nothing because I don't like the color blue, or I can put up blue and at least get the chance to explain and share my feelings.
There's a lot out there about it if you google it, but I like this page for the latest updates: https://www.facebook.com/worldautismawarenessday 
My disclaimer: I am not advocating any particular organization. I just want awareness, however it is achieved.
What are you doing to further awareness today? My son is now homeschooled so I can't make chocolate puzzle piece pops to school, and I work from home so I don't have co-workers to fill with cupcakes covered in puzzles pieces, but I'm out and about talking to other people and answering questions about my blue lights. And I found my autism car magnet, which I slapped on my car, pollen and all, lol.
Some of us aren't in a place where we can do anything, and that's okay. Your family comes first. Those first couple of years, it was all I could do to keep him from gouging out his eyes and ripping out his eyelashes and not breaking something and still get a little bit of sleep while holding onto the remnants of my sanity. Things are better now though, so I'm doing what I can, knowing that I will represent those still in the lowest of trenches. As a community, we have to come together today in this way.