Chinese New Year is one of the major holidays in China. It's celebrated on the first day of the first month of the Chinese calendar and continues to the fifteens day of the month, that is Lantern Festival. This makes the festival of New Year the longest in the Chinese calendar.
International Mobilization Day against Nuclear War is observed annually on January 28/29, the anniversary of adoption of the Delhi Declaration in 1985.
January 28 is annual celebration of Data Privacy Day. This day is observed worldwide including Europe, where this holidays is known as Data Protection Day.