1 a = df[:Date] 2 b = df[:Time] 3 c = map(join,zip(a,b), " ") 4 out = String[] 5 temp = String[] 6 for i in 1:length(a) 7 temp = map(join,zip([a[i]],[b[i]]), " ") 8 append!(out,temp) 9 end 10 df[:Date_Time] = out 11 df[:Date_Time] = DateTime.(df[:Date_Time],Dates.DateFormat("mm/dd/yyyy H:M:)