It's possible there was a local or regional event, but without more information, it's impossible to say for sure.
To get a more definitive answer, you would need to specify:
* The location of the parade: Was it in a specific city, state, or country?
* The type of parade: Was it a celebratory parade, a political rally, or something else?
* Any other details you might have: Do you know the name of the parade or any of the participants?
With more information, it might be possible to find out more about this parade.