Friday the 13th occurred twice in 2023, on January 13th and October 13th. While the exact origins of Friday the 13th are unknown, certain cultures throughout history have considered the date unlucky for various reasons. In Christianity, Friday is said to be the day Adam and Eve ate the forbidden fruit from the Tree of Knowledge, the day Cain murdered his brother, Abel, the day Jesus died, and the day Noahs ark set sail in the Great Flood. Additionally, Judas was the 13th guest at the Last Supper and the disciple most remembered for betraying Jesus Christ.

The superstitions surrounding Friday the 13th have led to the creation of words to describe the fear of the day, such as paraskevidekatriaphobia and friggatriskaidekaphobia. However, it is important to note that any calendar year has at least one, but no more than three, Friday the 13ths.

While some people may view Friday the 13th as an unlucky day, others celebrate it. For example, fans of the "Friday the 13th" horror movie franchise may dress up as the character Jason and visit filming locations, such as the Blairstown Diner in New Jersey.

In conclusion, nothing significant happened on Friday the 13th in 2023. It was simply a day that some people view as unlucky, while others celebrate it.