Ramadan
Response to comment [from a Muslim]: "Assalamu alaikum, The month of Ramadan is upon us, and am curious to see what people actually know about it. Give me your thoughts."
I know that our president made a bigger deal about it ("We Do Not Consider Ourselves A Christian Nation") than he did about Easter.
Response to comment [from a Christian]: "Catholic and Orthodox Christians have set times for fasting with different meanings..."
John MacArthur has a good sermon on fasting. He says "...[W]hen you get your heart right and you start living a life of obedience to the word of God, then you will have a real fast. A fast that I accept because it comes out of a true heart."
See:
Fasting Without Hypocrisy, Pt 1 Mt 6:16-18