 get a bit more complicated. One could modify
            the above to recognize whether a DST transition occurs sometime between <span class="code">last_ts</span>
            and the next three hours and, if so, make the necessary adjustments. This is generally what <span
                    class="code">wview</span> does. WeeWX takes a different approach and
            converts from UTC to local, does the arithmetic, then converts back. This is inefficient, but bulletproof
            against changes in 