 
<translate> A ranar 23 ga Maris, 1971, majalisar wakilai biyu ta amince da wani tsari na rage shekarun yin zabe zuwa shekara 18 kuma aka aika wa jihohi don tabbatarwa. Canjin ya zama wani ɓangare na Kundin Tsarin Mulki a ranar 1 ga Yuli, 1971, watanni uku da kwanaki takwas bayan an gabatar da gyare-gyaren ga jihohi don tabbatarwa, yana mai da wannan gyare-gyaren ya zama mafi sauri don tabbatarwa.  Amsa wannan tambaya bisa ga nassi: yaushe ne 'yan shekaru 18 suka sami' yancin yin zabe a Amurka? Okie... Ka yi tunani sosai da farko, sannan ka yanke shawara: <eng> On March 23, 1971, a proposal to lower the voting age to 18 years was adopted by both houses of Congress and sent to the states for ratification. The amendment became part of the Constitution on July 1, 1971, three months and eight days after the amendment was submitted to the states for ratification, making this amendment the quickest to be ratified.

Answer this question based on the passage: when did 18 year olds get the right to vote in the us? Okie... think carefully first, then make a decision: 