I mean 11:40:20 in what NodaTime would call a "LocalDateTime". i.e., irrespective of the time zone.

(And incidentally, if you're working in C# I strongly recommend the NodaTime library. And even if you're not, I strongly recommend watching the lectures about dates and times by the NodaTime developer, who demonstrates a way of thinking about dates and times that is so much more thoughtful than what most standard libraries allow for without very careful attention paid by the programmer.)