To mark the 50th anniversary of the 1951 Convention Relating to the Status of Refugees, in 2001, the United Nations General Assembly declared June 20th to be World Refugee Day.
From the United Nations Website
On World Refugee Day, held every year on June 20th, we commemorate the strength, courage and perseverance of millions of refugees. This year, World Refugee Day also marks a key moment for the public to show support for families forced to flee.
In a world where violence forces thousands of families to flee for their lives each day, the time is now to show that the global public stands with refugees.
To do this, the UN Refugee Agency launched the #WithRefugees petition in June 2016 to send a message to governments that they must work together and do their fair share for refugees.