World Hello Day is a secular unofficial holiday celebrated on November 21 by 180 countries to illustrate the importance of personal communication for preserving peace. On this day, people are encouraged to participate by simply greeting 10 people.
World Hello Day is a secular unofficial holiday celebrated on November 21 by 180 countries to illustrate the importance of personal communication for preserving peace. On this day, people are encouraged to participate by simply greeting 10 people.