Date and Time
  CurrentDate
  CurrentTime
  CurrentImplicitTimezone
  MakeDateTime(Date, Time) - returns DateTime
  ExtractFromDateTime[value](DateTime)
  ExtractFromDuration[value](Duration)
  FormatDateTime[pattern](DateTime) - returns String
  ParseDateTime[pattern](String) - returns DateTime
  DateTimeDifference(DateTime1, DateTime2) - returns Duration
  ShiftTimeZone (DateTime, timezoneOffset) - returns DateTime
  