September 1 has been a day of remarkable historical events across millennia, ranging from ancient religious ceremonies to modern technological breakthroughs. In the ancient and medieval eras, it saw the dedication of Rome's Temple of Juno Regina (396 BC), the crowning of Byzantine Emperor Isaak Komnenos (1057), and the capture of the Chinese Emperor during the Tumu Crisis in 1449. The date also holds deep religious significance, as the Sikh holy scripture, the Adi Granth (now Guru Granth Sahib), was first installed at the Harmandir Sahib in 1604, and in 1715, five-year-old Louis XV ascended to the French throne. The 19th century brought major scientific and military events, including the Carrington Event of 1859—the most intense geomagnetic storm ever recorded—and the decisive Prussian victory at the Battle of Sedan in 1870. Finally, September 1 marks notable social and technological firsts, such as Emma Nutt becoming the world's first female telephone operator in 1878, the tragic Great Hinckley Fire of 1894, and the opening of Boston's Tremont Street Subway in 1897, the first underground rapid transit system in North America.