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The Delhi Metro was the first metro and rail based system in the world to be certified by the United Nations for earning carbon credits, because its regenerative braking returns electricity to the grid each time a train slows.

Wangala is the post-harvest thanksgiving festival of the Garo tribe of Meghalaya, held in the autumn in honour of the sun deity Misi Saljong.

The Surajkund International Crafts Mela is held every February at Surajkund in Faridabad district of Haryana, near the Delhi border.

In the Rath Yatra of Puri, three chariots are drawn from the Jagannath temple to the Gundicha temple in the month of Ashadha.

Chapchar Kut is the best known festival of Mizoram, celebrated in late February or March after the jhum fields have been cleared and before the sowing.

Ganesh Chaturthi in the month of Bhadrapada had long been a household worship in Maharashtra. In 1893 Tilak organised it as a community celebration with public pandals, processions and lectures, so that people of every caste could gather in one place at a time when political meetings were watched.

Onam is the harvest festival of Kerala, celebrated in the Malayalam month of Chingam, and remembers the yearly return of the mythical king Mahabali to his people.

Rongali Bihu, also called Bohag Bihu, falls in mid-April at the start of the Assamese month of Bohag and opens the new year and the sowing season.

The Hornbill Festival is held at the Naga heritage village of Kisama near Kohima from 1 to 10 December, the state formation day being 1 December.

Commemorative coins are issued by the Government of India under the Coinage Act, and the set marking the Nabakalebara of the Jagannath temple was released at a function in Puri in March 2018 by the President.

The first ice climbing festival of Ladakh was held in the Nubra valley in January 2021, on the frozen waterfalls near the villages of the upper Nubra, as a way of building winter adventure tourism in a region that otherwise earns only in summer.

Bali Yatra is held on the bank of the Mahanadi at Cuttack on Kartik Purnima and remembers the days when merchants of Kalinga sailed to Bali, Java and Sumatra.

Thrissur Pooram is held at the Vadakkunnathan temple in Thrissur during the Malayalam month of Medam, which falls in April and May.

The 44th Chess Olympiad was played in 2022 at Mamallapuram near Chennai in Tamil Nadu, the first time India had hosted the team world championship of chess, and the Indian teams won bronze medals in the open section and in the women's section.

Arpad Elo was a Hungarian-born American physics professor and a strong amateur player who designed a statistical method to compare players, and FIDE adopted it.

Manuel Aaron of Chennai earned the International Master title in 1961, the first Indian to hold any international chess title, and he dominated the national championship for close to two decades at a time when India had no professional circuit.

The award, instituted in 1991 and now named the Major Dhyan Chand Khel Ratna, went in its very first year to the chess Grandmaster Viswanathan Anand, who had turned Grandmaster three years earlier and was then rising rapidly in world chess.

Gukesh, from Chennai, won the Candidates Tournament in 2024 and then beat the defending champion Ding Liren of China in the title match held at Singapore later the same year, taking the crown at the age of eighteen and becoming the youngest undisputed world champion in the history of the…

The knight moves in the shape of the letter L, two squares along a rank or file and then one square at right angles, and it is the only piece that may pass over any piece standing in its way, its own or the opponent's. This is why a knight…

The date marks the founding of FIDE, the international chess federation, in Paris on 20 July 1924, and the day is observed by chess federations across the world with tournaments and school events.