public DateAndTime getDateAndTime() {
        return this.dat;
    }
It seems reading CLK and CLKF are convenience ways of reading the PLCs Clock Data
- CLK seems to read the clock data via structured value (year, month, day, hour, ...)
- CLKF seems to read a formatted or extended format.
plc4j/drivers/s7/src/main/java/org/apache/plc4x/java/s7/readwrite/tag/S7ClkTag.java