Virtue: Among the seven days of the week, Friday is the day when Allah's Special mercies are granted. It is a day of gathering for the Muslims and rewards are increased. Many great events took place on this day, and yet to take place. I'll try enlightening the significance of The Jummah: Allah has blessed us a complete surah about Jummah Surah Al-Jumua.
"O you who have believed, when [the adhan] is called for the prayer on the day of Jumu'ah [Friday], then proceed to the remembrance of Allah and leave trade. That is better for you, if you only knew." [Quran 62:9]
The Messenger of Allah Prophet Muhammad Sallallahu Alaihi Wasallam (Peace and Blessings of Allah be upon him) said: “The best day the sun rises over is Friday; on it Allah created Adam. On it, he was made to enter paradise, on it he was expelled from it, and the Last Hour will take place on no other day than Friday.” [Ahmad & Tirmithi]
The day of Jumu'ah includes an hour during which all supplications are accepted. Abu Hurayrah, narrated that The Messenger of Allah Prophet Muhammad Sallallahu Alaihi Wasallam (Peace and Blessings of Allah be upon him) said: "On (the day of) Jumu'ah is an hour during which Allah gives to a Muslim servant standing in prayer whatever he asks for.” [Al-Bukhari & Muslim].
Reference: Surah Al-Jumu'ah 62