Table:
0
A
B
C
D
E
F
1
Scholar
Date
Triennial leap years (BC)
First Julian day
First aligned day
Quadriennial leap year resumes
2
Candidate solutions which may be correct
Candidate solutions which may be correct
Candidate solutions which may be correct
Candidate solutions which may be correct
Candidate solutions which may be correct
Candidate solutions which may be correct
3
Scaliger
1583
42, 39, 36, 33, 30, 27, 24, 21, 18, 15, 12, 9
2 Jan. 45 BC
25 Feb. AD 4
AD 8
4
Bennett
2003
44, 41, 38, 35, 32, 29, 26, 23, 20, 17, 14, 11, 8
31 Dec. 46 BC
25 Feb. 1 BC
AD 4
5
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
6
Bünting
1590
45, 42, 39, 36, 33, 30, 27, 24, 21, 18, 15, 12
1 Jan. 45 BC
25 Feb. 1 BC
AD 4
7
Christmann
1590
43, 40, 37, 34, 31, 28, 25, 22, 19, 16, 13, 10
2 Jan. 45 BC
25 Feb. AD 4
AD 7
8
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
9
Kepler
1614
43, 40, 37, 34, 31, 28, 25, 22, 19, 16, 13, 10
2 Jan. 45 BC
25 Feb. AD 4
AD 8
10
Ideler
1825
45, 42, 39, 36, 33, 30, 27, 24, 21, 18, 15, 12, 9
1 Jan. 45 BC
25 Feb. AD 4
AD 8
11
Matzat
1883
44, 41, 38, 35, 32, 29, 26, 23, 20, 17, 14, 11
1 Jan. 45 BC
25 Feb. 1 BC
AD 4
12
Soltau
1889
45, 41, 38, 35, 32, 29, 26, 23, 20, 17, 14, 11
2 Jan. 45 BC
25 Feb. AD 4
AD 8
13
Radke
1960
45, 42, 39, 36, 33, 30, 27, 24, 21, 18, 15, 12
1 Jan. 45 BC
25 Feb. 1 BC
AD 4

Questions and formulas:
Question: What is the First Aligned date in 1614?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,B1=1614),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F13,B2:B13=1614),5))
Level: medium