All Saints As A Holy Day of Obligation
The Catholic Encyclopedia provides a short account of the history of All Saints Day:
In the early days the Christians were accustomed to solemnize the anniversary of a martyr's death for Christ at the place of martyrdom. In the fourth century, neighbouring dioceses began to interchange feasts, to transfer relics, to divide them, and to join in a common feast; as is shown by the invitation of St. Basil of Caesarea (379) to the bishops of the province of Pontus. Frequently groups of martyrs suffered on the same day, which naturally led to a joint commemoration. In the persecution of Diocletian the number of martyrs became so great that a separate day could not be assigned to each. But the Church, feeling that every martyr should be venerated, appointed a common day for all. The first trace of this we find in Antioch on the Sunday after Pentecost. We also find mention of a common day in a sermon of St. Ephrem the Syrian (373), and in the 74th homily of St. John Chrysostom (407). At first only martyrs and St. John the Baptist were honoured by a special day. Other saints were added gradually, and increased in number when a regular process of canonization was established; still, as early as 411 there is in the Chaldean Calendar a "Commemoratio Confessorum" for the Friday after Easter. In the West Boniface IV, 13 May, 609, or 610, consecrated the Pantheon in Rome to the Blessed Virgin and all the martyrs, ordering an anniversary. Gregory III (731-741) consecrated a chapel in the Basilica of St. Peter to all the saints and fixed the anniversary for 1 November. A basilica of the Apostles already existed in Rome, and its dedication was annually remembered on 1 May. Gregory IV (827-844) extended the celebration on 1 November to the entire Church. The vigil seems to have been held as early as the feast itself. The octave was added by Sixtus IV (1471-84).
Is Friday Abstinence Required When the All Saints Falls on a Friday?
Since November 1st this year falls on a Friday and is a Holy Day of Obligation, a question arises on whether abstinence is obligatory this Friday. The answer, as clearly stated in the 1917 Code, is as follows:
"On [Sundays] or feasts of precept, the law of abstinence or of abstinence and fast or of fast only ceases, except during Lent, nor is the vigil anticipated; likewise it ceases on Holy [Saturday] afternoon" (1917 Code, Canon 1252 § 4). [Translation taken from THE 1917 OR PIO-BENEDICTINE CODE OF CANON LAW in English Translation by Dr. Edward Peters]
As All Saints Day falls outside of Lent, tomorrow is not a day of mandatory abstinence. However, this was actually a change from the practice observed for well over 1,000 years.
"To encourage her children in their Christmas joy, the Church has dispensed with the law of abstinence, if this Feast fall on a Friday. This dispensation was granted by Pope Honorius III, who ascended the Papal Throne in 1216. It is true that we find it mentioned by Pope St Nicholas I, in the ninth century; but the dispensation was not universal; for the Pontiff is replying to the consultations of the Bulgarians, to whom he concedes this indulgence, in order to encourage them to celebrate these Feasts with solemnity and joy: Christmas Day, St Stephen, St John the Evangelist, the Epiphany, the Assumption of our Lady, St John the Baptist, and SS Peter and Paul. When the dispensation for Christmas Day was extended to the whole Church, these other Feasts were not mentioned."