About World Telecommunication and Information Society Day
World Telecommunication and Information Society Day is observed on 17 May, the date the first International Telegraph Convention was signed in Paris in 1865, creating the body that is now the International Telecommunication Union. It has been marked since 1969 and took its present name in 2006. In 2027 it falls on Monday, 17 May 2027.
In 1865, twenty governments agreed on a common code, a common price and a common set of rules so that a telegram could cross a border without being rewritten by hand. Every mobile call you make today runs on the same idea, and 17 May is its anniversary.
Why is World Telecommunication Day on 17 May?
World Telecommunication and Information Society Day is on 17 May because the first International Telegraph Convention was signed in Paris on that date in 1865, creating the International Telegraph Union. That body is now the International Telecommunication Union, the United Nations agency for communication technology, with 194 member governments and over a thousand companies and organisations. In 2027 it falls on Monday, 17 May 2027.
The ITU's actual job is duller and more important than the day's speeches suggest: it divides up radio spectrum between countries, agrees technical standards so equipment from different makers works together, and coordinates satellite positions.
Why is the name so long?
The long name is the result of two observances being merged. World Telecommunication Day was marked from 1969 and was formally instituted by the ITU's conference at Malaga-Torremolinos in 1973. Separately, the World Summit on the Information Society asked the UN in 2005 to create a World Information Society Day, and the General Assembly did so in March 2006, choosing the same 17 May. Later that year the ITU's conference in Antalya decided to hold both together as World Telecommunication and Information Society Day. Most people, including many inside the industry, still say World Telecommunication Day.
The ITU sets a theme every year and publishes it months ahead, so take it from the ITU site rather than from a circulated poster.
- Spectrum
- The invisible radio airwaves that carry mobile signals. Governments sell slices of it to operators at auction.
- Teledensity
- Telephone connections per 100 people. It can pass 100 because many people hold more than one SIM.
- Broadband
- An internet connection above a defined minimum speed, whether over mobile, fibre or cable.
- Digital divide
- The gap between people who have reliable internet and devices and people who do not.
- Wireline
- A connection over a physical cable to a fixed address, as opposed to a mobile connection.
How connected is India?
India had 1,228.94 million telephone connections at the end of September 2025, according to the Telecom Regulatory Authority of India, of which 1,182.32 million were wireless. Broadband connections stood at 995.63 million, just short of a billion.
| Measure | India, end of September 2025 | What it means |
|---|---|---|
| Total telephone connections | 1,228.94 million | Mobile and fixed lines together |
| Wireless connections | 1,182.32 million | Mobile and fixed wireless |
| Broadband connections | 995.63 million | Internet connections above the regulator's speed threshold |
| Urban teledensity | 134.76 per 100 people | More connections than people, because of second SIMs and data-only devices |
| Rural teledensity | 59.52 per 100 people | Fewer than six connections for every ten rural residents |
The two teledensity figures are the whole argument of this day in one line. Urban India has more connections than people. Rural India has fewer than six for every ten residents. A day about the information society is, in Indian terms, a day about that gap: about villages where the signal works only from the roof, about women in households where the one phone belongs to a man, and about schools that went online in 2020 and lost the children who could not follow.
From the telegraph to the mobile phone in India
India's telegraph story began in 1850, when William O'Shaughnessy demonstrated a line in Bengal, and the first line opened between Calcutta and Diamond Harbour in 1851. At its peak in 1985 India sent about 60 million telegrams a year from some 45,000 offices. By 2013 only 75 telegraph offices were left, and BSNL shut the service in July of that year, with the last telegrams filed on 14 July. The department that had carried news of births, deaths and exam results for 162 years lost to the text message.
That is worth remembering on 17 May, because it is the honest version of the story. Networks do not just grow. They replace each other, and each replacement leaves behind people who relied on the older one.
What should you write on this day?
Write to the people who keep the connection up, not to the technology. Most of them hear from customers only when something breaks.
Happy World Telecommunication Day. You were on a tower in the rain during the cyclone so the rest of us could make calls. Thank you.
Happy World Telecommunication Day to the team that watches the dashboards at 3 am. Nobody notices a good night, and that is the point.
Happy World Telecommunication Day. You found the cut in that trench in forty minutes. The whole street owes you.
Happy World Telecommunication Day. You are the one who actually fixed my problem instead of transferring me. That deserves saying out loud.
Happy World Telecommunication Day. You got forty families onto video classes with two spare handsets and a lot of patience.
Happy World Telecommunication Day, Dadu. You learnt video calls at 78 and now you call at 7 am sharp. We would not have it any other way.
Happy World Telecommunication Day from the land of full bars. Still waiting for your voice notes to load. Someday.
Happy World Telecommunication Day. Spectrum, rural coverage, affordability. The unglamorous half is where the gap actually closes.
Do
- Thank field staff: tower technicians, linemen, fibre crews and installation teams.
- If you mark the day at work, do one useful thing, such as helping an elderly relative set up a phone properly.
- Check the ITU site for the current year's theme before printing anything.
Avoid
- Don't send this to someone in a low-connectivity district as a joke about their signal.
- Avoid claiming the day marks the invention of the telephone; it marks a treaty on telegraph rules in 1865.
Related days include National Technology Day on 11 May, World Radio Day on 13 February, World Post Day on 9 October and Engineers' Day on 15 September.
How to wish someone on World Telecommunication and Information Society Day
The people worth writing to on this day are the ones who keep a connection working: the tower technician on a hillside, the fibre team digging up your road, the call centre agent who actually solved it, the school IT teacher. For family, it can simply be a note about how the phone keeps you in touch, sent to someone who learnt video calls late and now uses them daily.
Write a few lines in your own words, pick a design and share it as one link on WhatsApp, Instagram or anywhere else. They open an animated card made just for them, with no app and no sign-up.
Language tip: English, Hindi + recipient language.
When is World Telecommunication and Information Society Day in 2026 and 2027?
World Telecommunication and Information Society Day is on 17 May every year. Only the weekday changes.
- 2026
- 2027
Frequently asked questions
Why is World Telecommunication and Information Society Day on 17 May?
It falls on 17 May because the first International Telegraph Convention was signed in Paris on 17 May 1865, creating the International Telegraph Union, which later became the International Telecommunication Union.
Why does the day have two names joined together?
World Telecommunication Day was observed from 1969 and formally instituted by the ITU in 1973. A separate World Information Society Day was created by the UN General Assembly in March 2006, also on 17 May, and the ITU's Antalya conference later that year merged the two.
What does the International Telecommunication Union do?
The ITU is the United Nations agency for communication technology, with 194 member governments. It allocates radio spectrum between countries, coordinates satellite orbits and agrees the technical standards that let equipment from different manufacturers work together.
How many mobile and internet connections does India have?
India had 1,228.94 million telephone connections at the end of September 2025, including 1,182.32 million wireless connections and 995.63 million broadband connections, according to the Telecom Regulatory Authority of India.
What is teledensity and why is India's urban figure above 100?
Teledensity is the number of telephone connections per 100 people. India's urban teledensity was 134.76 in September 2025 because many people hold more than one SIM or use data-only devices, while rural teledensity was 59.52.
When did India stop sending telegrams?
India's state-run telegram service, run by BSNL, closed in July 2013, with the last telegrams filed on 14 July. At its peak in 1985, India sent about 60 million telegrams a year from around 45,000 offices.
Last verified by the Kehdoo team on .