MiscRes: US / Julian Day Calendars (1951-1990)
Below are full, 1 year, U.S. calendar pics.
Each picture has the days and month as normal but below each day is the Julian Day for the year.
Several parts on Sportsters are coded with Julian Dates (especially engine cases, 1975-up).
These calendars will help decipher dates for parts using Julian dates.
When using these calendars, make sure to take the “Model Season” into account when deciding on what year calendar to use.