1. On September 13, 1999, the Arizona Diamondbacks set a franchise record with 14 runs in a single inning against the San Diego Padres. The team went on to win the game by a score of 18-4.

2. In 1923, the Arizona State Fair was held for the first time in Phoenix on September 13th. The fair has been held annually ever since, featuring a variety of attractions and entertainment for all ages.

3. September 13, 1880 marked the grand opening of the Arizona Canal, a major irrigation project that brought water from the Salt River to the Phoenix area. The canal helped transform the region into a major agricultural hub, and remains an important part of water infrastructure in the state.

4. On September 13, 1912, the Phoenix Symphony Orchestra played its very first concert, marking the beginning of a long and distinguished history of musical performances in the Valley of the Sun.

5. The biggest wildfire in Arizona history began on September 13, 2011, when the Wallow Fire ignited in the White Mountains. The fire burned over 538,000 acres before finally being contained, and caused significant damage to homes, businesses, and wildlife habitats.