Kas21 Fun Holiday – World Hello Day

World Hello Day on November 21 is an unofficial holiday created to promote world peace through interpersonal communication.

The unofficial holiday was created by Brian and Michael McCormack as a response to the Yom Kippur War between Israel and a coalition of Arab states led by Egypt and Syria in 1973.

Say Hello

The purpose of World Hello Day is simple – to encourage communication and dialogue between people of different backgrounds in order to achieve peace and understanding.

Since its beginning in 1973, the day has been celebrated around the world annually with several Nobel Peace Prize winners and peace activists taking part in it.

How to Celebrate?

• World Hello Day requires that participants greet at least 10 people. These people can be family and friends, but it is suggested that one finds strangers to greet and talk to.

Did You Know…

…that hello was used as a telephone greeting for the first time by Thomas Edison?

World Hello Day Observances

Fun Holiday: World Hello Day Observances
Year	Weekday	Date	Name
2025	Cum	21 Kas	World Hello Day
2026	Cmt	21 Kas	World Hello Day
2027	Paz	21 Kas	World Hello Day
2028	Sal	21 Kas	World Hello Day
2029	Çar	21 Kas	World Hello Day
2030	Per	21 Kas	World Hello Day
2031	Cum	21 Kas	World Hello Day
2032	Paz	21 Kas	World Hello Day
2033	Pzt	21 Kas	World Hello Day
2034	Sal	21 Kas	World Hello Day

See all Fun Holidays