Nope, longest year was 1712, which had two leap days in Sweden (i.e., February 30)https://twitter.com/qntm/status/799335316381372418 …
Replying to @rkh_facts
By "to date" I meant "since the relationship between atomic time and UTC was well defined" (1 January 1961)
1:47 AM - 18 Nov 2016
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