I believe the 1883 birth year on the tombstone, and also listed in the World War II Draft records to be in error...he was listed as 4 in the 1880 census. I believe 11 December 1876 to be the correct date.

1880 United States Federal Census
Name: Luther Julian
Age: 4
Birth Date: Abt 1876
Birthplace: Indiana
Home in 1880: Middleport, Iroquois, Illinois, USA
Dwelling Number: 437
Race: White
Gender: Male
Relation to Head of House: Son
Marital Status: Single
Father's name: Stephen Julian
Father's Birthplace: Ohio
Mother's name: Sarah Julian
Mother's Birthplace: Michigan
Neighbors: View others on page
Household Members:
Name Age
Stephen Julian 45
Sarah Julian 42
Elizabeth A. Julian 22
George E. Julian 17
Francis H. Julian 13
Dora Julian 9
Mary A. Julian 7
Luther Julian 4
Arthur Julian 2
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1900 United States Federal Census
Name: Luther Julien
Age: 23
Birth Date: Dec 1876
Birthplace: Illinois
Home in 1900: Scott, Crawford, Wisconsin
House Number: 5
Sheet Number: 10B
Number of Dwelling in Order of Visitation: 178
Family Number: 178
Race: White
Gender: Male
Relation to Head of House: Son
Marital Status: Single
Father's name: Stephen Julien
Father's Birthplace: Ohio
Mother's name: Sarah Julien
Mother's Birthplace: New York
Occupation: Day Laborer
Can Read: Yes
Can Write: Yes
Can Speak English: Yes
Household Members:
Name Age
Stephen Julien 85
Sarah Julien 62
Luther Julien 23
Eran Julien 15
Alonzo Chadwick 50
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U.S., World War I Draft Registration Cards, 1917-1918
Name: Luther Julien
Race: White
Birth Date: 11 Dec 1876
Residence Place: Iroquois, Illinois, USA
Physical Build: Medium
Height: Medium
Hair Color: Brown
Eye Color: Blue
Relative: Effie Julien
Relative's Relationship: Wife
(SOURCE: Ancestry.com).
Sometime between 1917 and 1920 he got YOUNGER!! 1920 Census he is listed as 1887 birth year, then 1882 and 1883.

This Luther married Effie Easter. There may be TWO Luther Julien's in Iroquois County, Illinois! One is listed as marrying an Ethel GOSSNELL Fox.