plot "$tmp" using 1:2 with lines, "$tmp2" using 1:2 with lines, "$tmp3" using 1:2 with lines
set xrange ["$previous_month":]
set format x "%d\n%m\n%Y"
plot "$tmp" using 1:2 with lines, "$tmp2" using 1:2 with lines, "$tmp3" using 1:2 with lines
set xrange ["$previous_month":]
set format x "%d\n%m\n%Y"