The answer is: Day of Pentecost

Acts 2:1-4 - called the "Feast of Weeks" in the Old Testament.

The Day of Pentecost is an exciting backdrop for the coming of the Holy Spirit to the apostles—a pivotal moment in early Christianity. This feast, which occurs 50 days after Passover, initially celebrates the wheat harvest in Israel, known as Shavuot in Hebrew, but over time, it became a time for communal remembrance of the giving of the Torah at Mount Sinai. How interesting is it that this festival celebrates both physical sustenance and spiritual enlightenment!

When the apostles gathered in Jerusalem that Pentecost, there was a buzz in the air, and suddenly, amidst powerful winds and fiery resolve, they felt the presence of the Holy Spirit. This moment was stunning and encoded deep meaning; it marked the birth of the Church. Each disciple began speaking in various tongues, initiating the spread of the good news to countless people, regardless of their backgrounds or languages. It's like receiving an instant translation boost but from a divine source!

Trivia lovers will appreciate that, in Jewish tradition, Pentecost is a time—much like the earlier gatherings after Jesus' resurrection—when strangers come together, often with a sense of reformation and renewal. So, rather than being just a revelatory "lighting flame,” think of it as a spark that ignited a movement, blazing in the lives of those 3,000 souls who found faith that day! It speaks to the inclusive and remarkable nature of human experience in searching for common connections and understanding amidst diversity.