USA (jan 1, 1913 – 9h 37min, may 14, 2024 y)
Description:
https://en.wikipedia.org/wiki/Revenue_Act_of_1913
https://en.wikipedia.org/wiki/Sixteenth_Amendment_to_the_United_States_Constitution
Added to timeline:
Date:
jan 1, 1913
9h 37min, may 14, 2024 y
~ 111 years