GENERAL KNOWLEDGE

Detailed explanation-1: -World Hello Day was created to respond to the Yom Kippur War between Israel and Arab nations. About 180 countries observe the secular holiday, and 31 Nobel Peace Laureates endorse it as an important tool for preserving peace. Every year, November 21 is celebrated as the World Hello Day 2022.

Detailed explanation-2: -World Hello Day began in 1973 as a simple response to the conflict between Egypt and Israel. The conflict was called the Yom Kippur War. Two brothers, Brian McCormack and Michael McCormack, founded World Hello Day. They mailed 1360 letters in 7 languages to encourage world leaders to participate.