A lot of people who are complaining about this event stressing them out 'cos it seems like it wants them to play DV at all hours of the day, choose DV over sleep, losing ranks 'cos you slept (that's how different time zones work!) have clearly never played an event on a pet site before.
The leaderboards are always there for only the most dedicated of folks. If that's not you, don't stress. Just try your best.