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Nate's original comment: https://twitter.com/NateSilver538/status/965704156106448898
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Blog post with handy table of birthdays: https://thewanderingengineer.com/2018/02/19/average-presidents-birthday/
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PresidentName
Days in Office
TermsBirthday
Birth day-of-year
DoY formula (no leap years)
Angle (degrees)
xyNameratan2(y,x)DoY check
5
1
George Washington
286522/22/1732535352.30.79090.6119
George Washington
1.0052.35389
6
2John Adams1460110/30/1735303303298.8-0.87590.4825John Adams1.00-61.230321
7
3
Thomas Jefferson
292224/13/1743103103101.60.9796-0.2009
Thomas Jefferson
1.00101.6103139
8
4
James Madison
292223/16/1751757574.00.96110.2761
James Madison
1.0074.075111
9
5
James Monroe
292224/28/1758118118116.40.8958-0.4444
James Monroe
1.00116.4118154
10
6
John Quincy Adams
146117/11/1767192192189.4-0.1628-0.9867
John Quincy Adams
1.00-170.6192132
11
7
Andrew Jackson
292223/15/1767747473.00.95620.2926
Andrew Jackson
1.0073.074110
12
8
Martin Van Buren
1461112/5/1782339339334.4-0.43280.9015
Martin Van Buren
1.00-25.633915
13
9
William Henry Harrison
3112/9/1773404039.50.63540.7722
William Henry Harrison
1.0039.54076
14
10John Tyler143013/29/1790888886.80.99840.0559John Tyler1.0086.888124
15
11James K. Polk1461111/2/1795306306301.8-0.84980.5271James K. Polk1.00-58.230618
16
12
Zachary Taylor
492111/24/1784328328323.5-0.59470.8039
Zachary Taylor
1.00-36.53284
17
13
Millard Fillmore
96911/7/1800776.90.12020.9927
Millard Fillmore
1.006.9743
18
14Franklin Pierce1461111/23/1804327327322.5-0.60850.7936Franklin Pierce1.00-37.53273
19
15
James Buchanan
146114/23/1791113113111.50.9307-0.3657
James Buchanan
1.00111.5113149
20
16
Abraham Lincoln
150322/12/1809434342.40.67440.7383
Abraham Lincoln
1.0042.44379
21
17
Andrew Johnson
1419112/29/1808364363358.0-0.03440.9994
Andrew Johnson
1.00-2.036339
22
18
Ulysses S. Grant
292224/27/1865117117115.40.9034-0.4289
Ulysses S. Grant
1.00115.4117153
23
19
Rutherford B. Hayes
1461110/4/1822277277273.2-0.99840.0559
Rutherford B. Hayes
1.00-86.827747
24
20
James A. Garfield
199111/19/1831323323318.6-0.66160.7498
James A. Garfield
1.00-41.43231
25
21
Chester A. Arthur
1262110/5/1829278278274.2-0.99730.0731
Chester A. Arthur
1.00-85.827846
26
22
Grover Cleveland
292243/18/1837777775.90.97010.2428
Grover Cleveland
1.0075.977113
27
23
Benjamin Harrison
146118/20/1833232232228.8-0.7527-0.6584
Benjamin Harrison
1.00-131.223292
28
25
William McKinley
165421/29/1856292928.60.47870.8780
William McKinley
1.0028.62965
29
26
Theodore Roosevelt
2728210/27/1858300300295.9-0.89960.4367
Theodore Roosevelt
1.00-64.130024
30
27
William Howard Taft
146119/15/1843258258254.5-0.9635-0.2678
William Howard Taft
1.00-105.525866
31
28
Woodrow Wilson
2922212/28/1856362362357.0-0.05160.9987
Woodrow Wilson
1.00-3.036238
32
29
Warren G. Harding
881111/2/1857306306301.8-0.84980.5271
Warren G. Harding
1.00-58.230618
33
30
Calvin Coolidge
204127/4/1872185185182.5-0.0430-0.9991
Calvin Coolidge
1.00-177.5185139
34
31
Herbert Hoover
146118/10/1874222222219.0-0.6288-0.7776
Herbert Hoover
1.00-141.0222102
35
32
Franklin D. Roosevelt
442241/30/1882303029.60.49380.8696
Franklin D. Roosevelt
1.0029.63066
36
33
Harry S. Truman
284025/8/1884128128126.20.8065-0.5913
Harry S. Truman
1.00126.2128164
37
34
Dwight D. Eisenhower
2922210/14/1890287287283.1-0.97410.2261
Dwight D. Eisenhower
1.00-76.928737
38
35
John F. Kennedy
103615/29/2917149149147.00.5452-0.8383
John F. Kennedy
1.00147.0149175
39
36
Lyndon B. Johnson
188618/27/1908239239235.7-0.8264-0.5632
Lyndon B. Johnson
1.00-124.323985
40
37Richard Nixon202721/9/1913998.90.15430.9880Richard Nixon1.008.9945
41
38Gerald Ford89517/14/1913194195192.3-0.2135-0.9769Gerald Ford1.00-167.7195129
42
39
James Earl Carter
1461110/1/1924274274270.2-1.00000.0043
James Earl Carter
1.00-89.827450
43
40
Ronald Reagan
292222/6/1911373736.50.59470.8039
Ronald Reagan
1.0036.53773
44
41
George H. W. Bush
146116/12/1924163163160.80.3294-0.9442
George H. W. Bush
1.00160.8163161
45
42
William Jefferson Clinton
292228/19/1946231231227.8-0.7412-0.6713
William Jefferson Clinton
1.00-132.223193
46
43
George W. Bush
292227/6/1946187187184.4-0.0774-0.9970
George W. Bush
1.00-175.6187137
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44Barack Obama292228/4/1961216216213.0-0.5452-0.8383Barack Obama1.00-147.0216108
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45Donald Trump39416/14/1946165165162.70.2967-0.9550Donald Trump1.00162.7165159
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Average1/1/2001-0.02880.0590Average0.07-26.0338.6<= avg day of yearcandidate avg angle =>3244236503692
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Dec 5by avg vector methodavg anglesum sq diffsum abs diff
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manually recorded =>3104326103718
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324<= avg day of yearfrom green cells above3114313983716
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Nov 20by min sum of sq methodby varying candidate avg3124302743714
54
3134292383712
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Nov 19-23by min abs diff method3144282903710
56
3154274303708
57
3164266583706
58
3174259743704
59
3184253783702
60
3194248703700
61
3204244503698
62
3214241183696
63
3224238743694
64
3234237183692
<= min sum abs diff
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minimizes sum sq =>3244236503692
<= min sum abs diff
66
3254236703692
<= min sum abs diff
67
3264237783692
<= min sum abs diff
68
3274239743692
<= min sum abs diff
69
3284242583694
70
3294246303698
71
3304243703700
72
3314241983702
73
3324241143704
74
3334241183706
75
3344242103708
76
3354243903710
77
3364246583712
78
3374250143714
79
3384254583716
80
3394259903718
81
3404266103722
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
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