It was narrated that Abu Lubaabah ibn ‘Abd al-Mundhir said: The Prophet (peace and blessings of Allaah be upon him) said: “Friday is the master of days, and the greatest of them before Allaah. It is greater before Allaah than the day of al-Adha and the day of al-Fitr. It has five characteristics: on this day Allaah created Adam, on it He sent Adam down to the earth, on it Allaah caused Adam to die, on it there is a time when a person does not ask Allaah for anything but He gives it to him, so long as he does not ask for anything haraam, and on it the Hour will begin. There is no angel who is close to Allaah, no heaven, no earth, no wind, no mountain and no sea that does not fear Friday.”
Narrated by Ibn Maajah, 1084; classed as hasan by Shaykh al-Albaani in Saheeh al-Jaami’, no. 2279
“They fear Friday” means they fear the onset of the Hour. This indicates that all created beings are aware of the days and they know that the Day of Resurrection will come on a Friday.