Julian calendar Leap year error Leap year error

| Scholar | Date_ | Triennial_leap_years_BC | First_Julian_day | First_aligned_day | Quadriennial_leap_year_resumes |
|---|---|---|---|---|---|
| Candidate solutions proven to be incorrect | Candidate solutions proven to be incorrect | Candidate solutions proven to be incorrect | Candidate solutions proven to be incorrect | Candidate solutions proven to be incorrect | Candidate solutions proven to be incorrect |
| Bünting | 1590 | 45, 42, 39, 36, 33, 30, 27, 24, 21, 18, 15, 12 | 1 Jan. 45 BC | 25 Feb. 1 BC | AD 4 |
| Christmann | 1590 | 43, 40, 37, 34, 31, 28, 25, 22, 19, 16, 13, 10 | 2 Jan. 45 BC | 25 Feb. AD 4 | AD 7 |
| Harriot | after 1610 | 43, 40, 37, 34, 31, 28, 25, 22, 19, 16, 13, 10 | 1 Jan. 45 BC | 25 Feb. 1 BC | AD 4 |
| Kepler | 1614 | 43, 40, 37, 34, 31, 28, 25, 22, 19, 16, 13, 10 | 2 Jan. 45 BC | 25 Feb. AD 4 | AD 8 |