You'd think so (as did I) but apparently that's not the case. From Wikipedia:I thought the formal definition of the yard is still 36 inches. The inch is defined as exactly 25.4 mm. Same final number, but a different derivation.
Definition of the yard in terms of the meter
Subsequent measurements revealed that the yard standard and its copies were shrinking at the rate of one part per million every twenty years due to the gradual release of strain incurred during the fabrication process.[48][49] The international prototype meter, on the other hand, was comparatively stable. A measurement made in 1895 determined the length of the meter at 39.370113 inches relative to the imperial standard yard. The Weights and Measures (Metric) Act of 1897[50] in conjunction with Order in Council 411 (1898) made this relationship official. After 1898, the de facto legal definition of the yard came to be accepted as 36/39.370113 of a meter.
The yard (known as the "international yard" in the United States) was legally defined to be exactly 0.9144 meter in 1959 under an agreement in 1959 between Australia, Canada, New Zealand, South Africa, the United Kingdom and the United States.[51] In the UK, the provisions of the treaty were ratified by the Weights and Measures Act of 1963. The Imperial Standard Yard of 1855 was renamed the United Kingdom Primary Standard Yard and retained its official status as the national prototype yard.[52][53]
Link to reference 51: https://www.ngs.noaa.gov/PUBS_LIB/FedRegister/FRdoc59-5442.pdf