There's an additional related stepping stone here (as it is name dropped in the library's design document as well) in that TC-39 has been hard at work on a prop

There's an additional related stepping stone here (as it is name dropped in the library's design document as well) in that TC-39 has been hard at work on a proposal to standardize similar APIs into EcmaScript (JS) called Temporal: https://tc39.es/proposal-temporal/docs/ https://tc39.es/proposal-temporal/docs/ Temporal benefits from the JodaTime/Java 8+ date work, but also includes more recent IETF and IANA standards as other influences.