Instead of changing the definition of second, it might make sense to separate day-time from scientific time. Decimal hours and minutes would be normal time keep

Instead of changing the definition of second, it might make sense to separate day-time from scientific time. Decimal hours and minutes would be normal time keeping. If needed more accuracy, then would switch use centi-minute for casual use or second for scientific use. One nice feature is that the day-time would be different on other planets. There would Mars-day and Mars-hour. But the second would be the same.