DateTime functions not available in nanoflows?

Hi community, I'm trying to put some dateTime functions in a nanoflow for use in a offline app, but functions like addHours and parseDateTime don't seem to be available in a nanoflow. 'Unknown function' is the feedback I get from the modeler. Am I doing something wrong or is there an explanation for this?  
1 answers

See this forum idea:

Apparantly a subset of the microflow expressions are available and more functions are on the backlog.