I think is was only valid before the first game daily reset for the event, it just means people who got it well be done 12-24 hours ahead of others, depending on how they play the event, and RNG.
There well not be a hard mode for this event, and once people are done they well not have any event stuff to do, until the next event.
Personally I do not like how the clean energy event got another mode to it, if people complete them faster then others big deal, let them wait for the next event for some more to do. I really liked the events Ray first had, you could complete them in a day if you pushed your self or have fun with it and play the events as you felt necessary, as long as you got it done before the event was taken down all was good.
There well not be a hard mode for this event, and once people are done they well not have any event stuff to do, until the next event.
Personally I do not like how the clean energy event got another mode to it, if people complete them faster then others big deal, let them wait for the next event for some more to do. I really liked the events Ray first had, you could complete them in a day if you pushed your self or have fun with it and play the events as you felt necessary, as long as you got it done before the event was taken down all was good.
IGN: Mythic Guild: Chaos