It is not permissible for a Muslim to celebrate any of the festivals of the kuffaar. Valentines Day is an innovated festival for which there is no basis in Islam. The clear evidence of the Qur’aan and Sunnah – and the consensus of the early generations of this ummah – indicates that there are only two festivals in Islam: Eid al-Fitr and Eid al-Adha. Any other festivals that have to do with a person, a group, an event or anything else are innovated festivals, which it is not permissible for Muslims to observe, approve of or express joy on those occasions, or to help others to celebrate them in any way, because that is transgressing the sacred limits of Allaah, and whoever transgresses the sacred limits of Allaah has wronged himself. Many Muslims these days indulge in this filthy festival. However, they would do well to remember the famous saying of the Prophet (صلي الله عليه وسلم): “Whoever imitates a people is one of them.” (narrated by Ahmad, 2/50; Abu Dawood, 4021)