Safe Harbor is the last day to bring NEW cases challenging election results. Safe Harbor is NOT achieved for cases with active challenges that were filed or challenged before that date. In fact, in the statue is specifically says it is only achieved IF challenges have been completed by that time. Furthermore, Safe Harbor does not apply to CRIMINAL cases that may arise (there is no date or statue on that) only to CIVIL case challenges. This was a smart move by SCOTUS. They are hearing on Trump's challenge and have basically made it so Pennsylvania and the Dems won't be able to open a new challenge to try and buy time once the hearing happens.