Thatâs capital delta (lower case is Î´), a letter of the Greek alphabet. It can be used in equations just like normal letters in a similar manner to x. It is usually used to represent: a difference. an angle.
Roosevelt also sought to convince the public that an international organization was the best means to prevent future wars. The Senate approved the UN Charter on July 28, 1945, by a vote of 89 to 2. The United Nations came into existence on October 24, 1945, after 29 nations had ratified the Charter.
Since then every year, 24th October is celebrated as the United Nations Day. The UN Charter: The Charter is the Constitution of the United Nations Organisation. It was made in October 1944 by the Dumbarton Oaks (Washington DC) Conference. It lays down the rules which govern the organisation and functions of the UNO and all its organs.