tick over वाक्य

So why didn't all those computer professionals do the ethical thing and prevent or blow the whistle on the year 2000 computer problem _ a glitch that some experts warn could cause such threats to health and safety as malfunctioning medical equipment and wayward airplanes when when the clock ticks over to Jan . 1, 2000?
Each time I log in to the wikipedia home page, in the "'selected anniversaries "', the previous day's anniversaries are perpetually shown . ( I have no problem with cookies etc . ) I request the people responsible for maintaining that section edit it a day in advance so that the server dishes out the correct anniversary, as midnight ticks over, for us editing at that hour.