According to the search results, there are several holidays and observances celebrated on September 23. Some of them are:
- National Family Day
- Celebrate Bisexuality Day
- Education Technology Day
- Innergize Day
- International Day of Sign Languages
- National Seat Check Saturday
- National Snack Stick Day
- Redhead Appreciation Day
- Restless Legs Awareness Day
- Autumnal Equinox (First Day of Autumn)
It is important to note that some of these holidays are celebrated annually, while others may be observed only in certain years.
