Or we could adopt the "smearing" technique in either direction and we could do it hourly or daily or weekly or monthly or half-yearly or whatever interval as ag

Or we could adopt the "smearing" technique in either direction and we could do it hourly or daily or weekly or monthly or half-yearly or whatever interval as agreed. Maybe we should do it every 6 months no matter what. That way, everyone would know that on June 30 and December 31, there would be smeared seconds. That makes the "do it rarely and people will screw it up" problem go away.