3.14（双节日）：白色情人节white day+国际数学日Pi Day π节
Today is March 14th, the White Valentine's Day, which originates from Rome in the third century. It is said that the Rome empire saved two lovers who disobeyed the ban on love and marriage and should be sentenced to death in 14th,February , and in order to remember this day, the empire set it as the Valentine's Day. One month later in 14th, Marth, the saved couple swore that their love would last forever until their death, so to the memory of this day, the White Valentine's Day was set.
