Version 0.10.1 of package Datetime has just been released in NonGNU ELPA. You can now find it in M-x list-packages RET.
Datetime describes itself as: =========================================== Parsing, formatting and matching timestamps =========================================== More at https://elpa.nongnu.org/nongnu/datetime.html ## Summary: Library for generic timestamp handling. It is targeted at bulk processing, therefore many functions are optimized for speed, but not necessarily for ease of use. For example, formatting is done in two steps: first you need to generate a formatting function for given pattern, and only using it obtain formatted strings. Package's main feature is timestamp parsing and formatting based on Java pattern. Arbitrary timezones and locales (i.e. not necessarily those used by the system) are supported. However, specifying timezone in the input string to the parser function is not implemented yet. See functions `datetime-parser-to-float' and `datetime-float-formatter' for details. ## Recent NEWS: [Not provided 🙁]
