World Telecommunications Day (World Telecommunications Day), on May 17, 1969, the 24th session of the International Telecommunication Union executive council formally passed a resolution, decided to the International Telecommunication Union's founding date - May 17 as the "World Telecommunication Day", and required the member states from 1969 onwards,
Commemoration is held every year on May 17.
In November 2006, the International Telecommunication Union (ITU) merged World Telecommunication Day and World Information Society Day into World Telecommunication and Information Society Day.

In 2021, the theme of World Telecommunication and Information Society Day is "Accelerating Digital Transformation in Difficult Times".

Telecommunications refers to the means of communication that transmit information by telegraph, telephone, facsimile, radio equipment and the Internet.
The telegraph was officially used for public communication in 1844.
In order to make the telegraph play a greater role, some European countries successively set up "German Austrian Telegraph Union" and "Western European Telegraph Union".

On May 17, 1865, France, Germany, Russia, Italy, Austria and other more than 20 countries signed the International Telegraph Convention in Paris, France, and announced the establishment of the International Telegraph Union.

With the widespread use of telephone and radio, the International Telegraph Union (ITU) decided to change its name to the International Telecommunication Union (ITU) at its fifth congress held in Madrid, Spain in 1932.
In 1947 the League became a specialized agency of the United Nations, with headquarters in Geneva, Switzerland.
The ITU has 191 members. China joined in 1920.

In order to commemorate the establishment of the international telecommunication union, emphasize the telecom role in national economic development and people's life, the international telecommunication union, in 1968 the 23rd, the administrative council decided to as the "world telecommunication day on May 17, and requires each member states since 1969, according to the international telecommunication union telecommunication day theme of the identified commemorative activities,
Publicize the importance of telecommunication, popularize telecommunication science and technology, and cultivate the interest of the young generation in telecommunication.

Every year, during World Telecommunication Day, each member country of the International Telecommunication Union (ITU), including China, will hold a variety of themed activities to promote the healthy development, popularization and sharing of their network communication industry.