“Holiday.” Some think hear the word and think of Christmas, the annual celebration of the birth of Jesus Christ. Others think Rosh Hashanah, the first of the High Holy Days in Judaism. There’s Memorial Day, when we remember those who died while serving in America’s armed forces. We have Kwanzaa. Mardi Gras. Eid Al-Fitr and Eid-Al-Adha.So many cultural beliefs and traditions around the world define what we call holidays, so why not add something new that binds all of us to our increasingly tech-centric planet?Today, July 17, is “officially” (whatever that means) World Emoji Day, commemorating … well, we’re not really sure.