851 Ordo
Anno Domini DCCCLI
Tabula Temporaria
- Golden Number
- XVI
- Dominical Letter
- A
- Sundays after Epiphany
- 2
- Sundays after Pentecost
- 28
Moveable feasts
- Septuagesima Sunday
- January 22
- Ash Wednesday
- February 8
- Easter (Pascha) Day
- March 26
- Ascension Day
- May 4
- Pentecost
- May 14
- Corpus Christi
- May 25
- Advent Sunday
- December 3
Ember days
- Spring (Lent)
- February 15, 17, 18
- Summer (Whitsun)
- May 17, 19, 20
- Autumn (Holy Cross)
- September 20, 22, 23
- Winter (Advent)
- December 20, 22, 23