diff --git a/streamlit_analytics/display.py b/streamlit_analytics/display.py
index 9a8cbbb..04bf1bd 100644
--- a/streamlit_analytics/display.py
+++ b/streamlit_analytics/display.py
@@ -60,7 +60,11 @@ def show_results(counts, reset_callback, unsafe_password=None):
             alt.themes.enable("streamlit")
         except:
             pass  # probably old Streamlit version
+
         df = pd.DataFrame(counts["per_day"])
+        # Formatting date by ISO-8601 to fix altair's date parsing bug 
+        df["days"] = df["days"] + "T00:00:00"
+
         base = alt.Chart(df).encode(
             x=alt.X("monthdate(days):O", axis=alt.Axis(title="", grid=True))
         )
diff --git a/streamlit_analytics/main.py b/streamlit_analytics/main.py
index 442b5ec..2ba17d8 100644
--- a/streamlit_analytics/main.py
+++ b/streamlit_analytics/main.py
@@ -20,11 +20,11 @@
 
 def reset_counts():
     # Use yesterday as first entry to make chart look better.
-    yesterday = str(datetime.date.today() - datetime.timedelta(days=1))
+    today = datetime.date.today()
     counts["total_pageviews"] = 0
     counts["total_script_runs"] = 0
     counts["total_time_seconds"] = 0
-    counts["per_day"] = {"days": [str(yesterday)], "pageviews": [0], "script_runs": [0]}
+    counts["per_day"] = {"days": [str(today)], "pageviews": [0], "script_runs": [0]}
     counts["widgets"] = {}
     counts["start_time"] = datetime.datetime.now().strftime("%d %b %Y, %H:%M:%S")