"Indeed, the Day of Judgement" means the verdict. "Is the appointed time for them all" means the appointed time for their resurrection.
﴿إِن يَوْم الْفَصْل﴾ يَعْنِي: الْقَضَاء ﴿ميقاتهم أَجْمَعِينَ﴾ أَي: مِيقَات بَعثهمْ
