My first though was because you're based in California, that you likely found it there. Are you located in Northern California, because your bracelet find appears to be Chinese to me.
In the Chinese culture hummingbirds symbolize good luck. This symbolic meaning derives from the Chinese culture that used the hummingbird as the Feng Shui symbol of good luck. This good luck symbolism can also be linked to the joy symbolism because, in the aspect of universal energy, joyous positive energy attracts good vibrations.
Hopefully someone here can give you more information,