Ascension Day is the 40th day from Easter Sunday and celebrates Christ ascension to Heaven. In 2023 in the USA it is on today, Thursday, May 18.
https://www.christianity.com/jesus/earl ... n-day.html
https://en.wikipedia.org/wiki/Feast_of_the_Ascension
https://en.wikipedia.org/wiki/Ascension_of_Jesus
https://www.pillarcatholic.com/p/two-as ... -ascension