Is it yet acceptable for an American to wish everyone a Happy May Day?

May Day occurs on May 1 and refers to any of several public holidays.^[1] In many countries, May Day is synonymous with International Workers' Day, or Labour Day, which celebrates the social and economic achievements of the labor movement. As a day of celebration, however, the holiday has ancient origins and can relate to many customs that have survived into modern times. Many of these customs are due to May Day being a cross-quarter day, meaning that it falls approximately halfway between a solstice and an equinox.