The Dominical Letter is related to the Solar Number. For Julian years, then Dominical Letter can be found in the table below.
| Solar Number | Dominical Letter | Solar Number | Dominical Letter | |
|---|---|---|---|---|
| 1 | GF | 15 | C | |
| 2 | E | 16 | B | |
| 3 | D | 17 | AG | |
| 4 | C | 18 | F | |
| 5 | BA | 19 | E | |
| 6 | G | 20 | D | |
| 7 | F | 21 | CB | |
| 8 | E | 22 | A | |
| 9 | DC | 23 | G | |
| 10 | B | 24 | F | |
| 11 | A | 25 | ED | |
| 12 | G | 26 | C | |
| 13 | FE | 27 | B | |
| 14 | D | 28 | A |
For Leap years, there are two Dominical Letters. The first one is for January and February. The second one is for March to December.
Like with the Epact, for a Gregorian year a correction has to be made.
The following table lists the correct Domincal Letters for the years up to 2499.
| Solar Number | Dominical Letter | ||||||
|---|---|---|---|---|---|---|---|
| 1583-1699 | 1700-1799 | 1800-1899 | 1900-2099 | 2100-2199 | 2200-2299 | 2300-2499 | |
| 1 | CB | DC | ED | FE | GF | AG | BA |
| 2 | A | B | C | D | E | F | G |
| 3 | G | A | B | C | D | E | F |
| 4 | F | G | A | B | C | D | E |
| 5 | ED | FE | GF | AG | BA | CB | DC |
| 6 | C | D | E | F | G | A | B |
| 7 | B | C | D | E | F | G | A |
| 8 | A | B | C | D | E | F | G |
| 9 | GF | AG | BA | CB | DC | ED | FE |
| 10 | E | F | G | A | B | C | D |
| 11 | D | E | F | G | A | B | C |
| 12 | C | D | E | F | G | A | B |
| 13 | BA | CB | DC | ED | FE | GF | AG |
| 14 | G | A | B | C | D | E | F |
| 15 | F | G | A | B | C | D | E |
| 16 | E | F | G | A | B | C | D |
| 17 | DC | ED | FE | GF | AG | BA | CB |
| 18 | B | C | D | E | F | G | A |
| 19 | A | B | C | D | E | F | G |
| 20 | G | A | B | C | D | E | F |
| 21 | FE | GF | AG | BA | CB | DC | ED |
| 22 | D | E | F | G | A | B | C |
| 23 | C | D | E | F | G | A | B |
| 24 | B | C | D | E | F | G | A |
| 25 | AG | BA | CB | DC | ED | FE | GF |
| 26 | F | G | A | B | C | D | E |
| 27 | E | F | G | A | B | C | D |
| 28 | D | E | F | G | A | B | C |
| 1583-1699 | 1700-1799 | 1800-1899 | 1900-2099 | 2100-2199 | 2200-2299 | 2300-2499 | |
For example: the Dominical Letter for the year 1999 (Solar Number 20) is C.
All Sundays for a given year can be found in the Sundays table.