Reset variable on an offline player at 23:59

[Zunick]

So i want a player variable resetted every time the real time clock hits 23:59, but my skript doesn't work:

every 40 seconds:
    if "%now%" contains "23:59":
        loop {playersJoined::*}:
            set {_value} to "%loop-value%" parsed as an offline player
            set {jobs.earned.%{_value}%} to 0