Why Christians do not celebrate Ramadan?

Question

According to Christians, Christmas has nothing to do with Christianity so  everyone need to take a part in Christmas celebration at work, so in case ramadan has nothing to do with islam 

Answer 1

Christmas has everything to do with Christianity. It is the celebration of the birth of Christ. 

Answer 2

Because it is Pagan just like Islam

Answer 3

There is no prohibition on celebrations, you can celebrate what you want and practice what you prefer. However, your activities are restricted on government properties. This is because we live in a secular state. This is the U.S. Foundation and is in the U.S. Constitution. We do not want another Star Chambers.