Bing found the following results
Pentecost - Wikipedia
BBC - Religions - Christianity: Pentecost
What Is Pentecost and Where Did It Come From? - Christianity
What is Pentecost? 9 key things to know about Pentecost - Christian Today
Pentecost | The Church of England
Pentecost | Description, Observances, & History | Britannica
What Is Pentecost? And Why Is It Important? - BibleProject
What Is the Day of Pentecost? Bible Story Study Guide - Learn …
Factsheet: Pentecost - Religion Media Centre
Pentecost - Vatican News