Is it shirk for a Muslim to celebrate Valentine's Day?

Is it shirk for a Muslim to celebrate Valentine's Day , according to the Sunna? Wikipedia writes: > Valentine's Day, also called Saint Valentine's Day or the Feast of Saint Valentine, is an annual holiday celebrated on February 14. It originated as a Western Christian liturgical feast day honoring one or more early saints named Valentinus, and is recognized as a significant cultural and commercial celebration in many regions around the world, although it is not a public holiday in any country.