No problem as long as you don't move the clock back x minutes and then decide that you did not move it back enough and move it again before x minutes have passed.  Fortunately, no government in the world can pass a new law in an hour.  More so in an hour between 01:00 and 02:00 AM. :-)

An interesting possibility is a fold straddling a leap second, but hopefully those who pass the timekeeping laws have learned about the leap seconds by now.