Datetime parse format for round-trip "O"

[jmgomez]

Hey guys,

What would be the date format for the round trip O in nim? 
(<https://docs.microsoft.com/en-us/dotnet/standard/base-types/standard-date-and-time-format-strings#Roundtrip>)

So I can do
    
    
    
    
    let date = parse ("2022-04-25T13:03:28.8936219Z", ???, utc())
    
    
    
    Run

Thanks!

Juan