Does Christianity allow Christians to celebrate other holidays?

A quick search on Google will come up with several Christian holidays including: - Valentine's Day - Good Friday - Thanksgiving - Christmas However, in many multi-cultural countries, there are often holidays which are from other religions, other beliefs or even tradition itself. For example a Chinese Christian celebrating Mid-Autumn Festival . Is that allowed? PS: Today is Mid-Autumn Festival, the 15th day of the 8th Month on the Lunar Calendar. Chinese celebrate this day by bring out laterns, eating mooncakes, and reciting poems. It's kind of a tradition to me personally, but there are beliefs and myths behind the festival.