how to parse a string into a phobos datatype with additional logic

[yawniek via Digitalmars-d-learn]

what is the way one is supposed to parse e.g. a
double of unixtime (as delived by nginx logs) into a SysTime?

currently i'm creating a wrapper struct around SysTime with alias 
this as:

https://gist.github.com/yannick/6caf5a5184beea0c24f35d9d4a4c7783

really ugly imho.

is there a better way to do this?