I think this is a mental block people have. I grew up on zero based arrays in C, but I can't say this has caused me any issues thus far using Julia.

I don't know how it is for others but for me I just into this mode where I think about Julia as doing math and I know in math you start at 1 for vectors and matrices.

Besides the way functions and APIs work, you seldom have to write code that really depends on the start index.