diff --git a/wsgi.py b/wsgi.py
index a70c4e5..6aec640 100644
--- a/wsgi.py
+++ b/wsgi.py
@@ -122,13 +122,18 @@ def plot(
 
     # plt.gcf().autofmt_xdate()
 
-    plt.gca().xaxis.set_major_locator(mdates.WeekdayLocator([mdates.TU]))
+    # use timezone offset to center tick labels
+    plt.gca().xaxis.set_major_locator(
+        mdates.WeekdayLocator([mdates.TU], tz="Etc/GMT+12")
+    )
     plt.gca().xaxis.set_minor_locator(mdates.DayLocator())
     plt.gca().xaxis.set_major_formatter(mdates.DateFormatter("%a %d.%m."))
 
-    plt.grid(True, which="major", axis="both")
+    plt.grid(True, which="major", axis="y")
     plt.grid(True, which="minor", axis="x")
 
+    plt.gca().tick_params("x", length=0, which="major")
+
     def val_to_perc(val):
         return 100 * val / total_target