I tried to rotate my TickLabels with another contribution from this website.
I load the package CustomTicks.m
Beta0 = Import["beta0_Monatsende.xls"]; DateListPlot[Beta0, PlotRange -> Full; FrameLabel -> {Zeit [Monat], Subscript[\[Beta], 0]}, FrameTicks -> {{LinTicks[0, 14, 2, 2], LinTicks[0, 14, 2, 2]}, {{{1972, 09}, {1975, 09}, {1978, 09}, {1981, 09}, {1984, 09}, {1987, 09}}, Automatic}}, DateTicksFormat -> {"MonthNameShort", " ", "Year"}] /.x : (FrameTicks -> _) :> (x /. s_String :> Rotate[s, 90 Degree]) Now the labels on the x axis are rotated, but also on the y axis. Is there any possibility to rotate only the labels on the x axis?



LinTicks[]come from? $\endgroup$/.in the snippet you gave, try this replacement rule instead:x : (FrameTicks -> _) :> MapAt[# /. s_String :> Rotate[s, π/2] &, x, {2, 2, 1}]$\endgroup$