Syntax error in custom function to covert UTC to Central Time

The error messages often point to something other than what they specifically indicate.

Examining the code window can give you some hints.

For example, there is no `mod` operator in PQ and you will see that it has a wavy red underline in the editor:

You need to use the `Number.Mod` function.

Also, if your computer itself is set to Central Time, there is a much simpler method to convert to local time (or to the local time of whatever a computer is set to (and it will take DST into account):

// Function to convert UTC to Local Time)
(ConvertUTCtoLT as datetime) =>
let
    addTZ = DateTime.AddZone(ConvertUTCtoLT,0),
    toLocal = DateTimeZone.ToLocal(addTZ),
    localDateTime=DateTime.From(toLocal)

in
localDateTime