In general, comparing dates directly is a little unreliable. I would use decimal-date-time() to convert the string and date first to number of days past Unix Epoch and see if the difference is roughly greater than 180 days.
In general, comparing dates directly is a little unreliable. I would use decimal-date-time() to convert the string and date first to number of days past Unix Epoch and see if the difference is roughly greater than 180 days.