# [MATL], 4 bytes

    15XO

[Try it online!]

[MATL]: https://github.com/lmendo/MATL
[Try it online!]: https://tio.run/nexus/matl#@29oGuH//7@6qZWJgUKArzoA "MATL – TIO Nexus"

###Explanation

Builtin function: date string conversion with automatic detection of input format, and with output format `15`, which corresponds to `'HH:MM'`. This is equivalent to [@StewieGriffin's Octave answer](http://codegolf.stackexchange.com/a/105862/36398).