Short answers, pulled from the story.
Tynwald is the legislature of the Isle of Man, formally known as the High Court of Tynwald. It is recognized as the oldest continuous legislature in the world, predating even the English Parliament in terms of unbroken operation.
Tynwald claims a founding date of 979, which was chosen arbitrarily by officials for the 1979 millennium celebrations. Historical evidence places the first written record of the Tynwald place-name in the Chronicles of Mann from the 13th-14th centuries, and the earliest surviving record of the House of Keys dates from 1417.
Tynwald Day is held annually, usually on the 5th of July, at an open-air ceremony at Tynwald Hill in St John's. All laws are promulgated in both Manx and English, and petitions are received. Any Act of Tynwald not promulgated at St John's within 18 months of passage becomes null and void.
The name Tynwald derives from the Old Norse compound Þingvǫllr, meaning "meeting place of the thing," or literally the "Thingfield." It shares the same root as Iceland's Þingvellir and Norway's Tingvoll.
Marion Shimmin of the Manx Labour Party was the first woman elected to the House of Keys, winning a by-election in 1933. Women became eligible to stand for election following the introduction of universal adult suffrage based on residency in 1919.
Iceland's Althing was established in 930, making it older than Tynwald's traditional founding date of 979. However, the Althing was disbanded in 1800 and only restored in 1845, so Tynwald claims the title of the oldest continuous legislature in the world based on unbroken operation.