TIL DST is motivated by energy conservation
Originally adopted in 1918 during World War I, reinstated during World War II, and finally made permanent under the Uniform Time Act in 1966, DST was intended to (somehow) save electricity by requiring less light in the evenings. However, real‐world studies repeatedly have shown that DST not only doesn’t conserve energy, but may actually waste it.
Personally, I'm most enraged when accounting for DST in code.