A number of solutions have been proposed to address these problems. Some clocks are effectively stopped at 23:59:59 for an extra second on a leap second day, so that two consecutive seconds have the same name. Another solution is to slow the advance of the time on a leap second day to amortize the extra second over some period of time. The time increases monotonically with this method, although the rate of advance is not correct during the adjustment period. Both these solutions have problems.