Yahweh's Holy Days - Should we be following them?

[Rainelle Harrell]

Yahweh proclaimed certain Holy Days - Feasts for Himself as in Leviticus 23. Should we be following them? Why don't we? The major holidays that Christians celebrate,Christmas and Easter,are not in the Bible. Personally I have studied Christmas and Easter and I feel uncomfortable with them both because they are loaded with paganism. I cannot imagine that Yahweh looks favorably upon these contaminated holidays of Christmas and Easter as we celebrate them. Yahweh set aside certain feast days for himself. I am sure that Yahweh knows that we are party animals. He made us. These feast days were there for Yahweh and for us. Why did we discard them?
What are your thoughts?