What does Diem Ex Dei mean

It means Day of God.

http://en.wiktionary.org/wiki/Appendix:List_of_Latin_phrases_(A%E2%80%93E)

"Diem Ex Dei" is a Latin phrase that translates to "Day from God" or "God's day" in English. In Latin, "diem" means "day," "ex" means "from," and "Dei" means "God."

To understand the meaning of Latin phrases like "Diem Ex Dei," it is useful to have a basic understanding of the Latin language. Latin is an ancient language that was widely spoken by the Romans and used throughout the Roman Empire. It has had a significant influence on modern languages, especially in scientific, medical, and legal terminology.

To find the translation and meaning of Latin phrases, you can use various resources, such as Latin dictionaries, online translation tools, or consult experts in Latin language and literature. These resources will provide you with accurate interpretations and explanations of Latin phrases based on established linguistic principles and historical contexts.