diff --git a/yfinance/base.py b/yfinance/base.py
index 1e67362c8..0cb0cc568 100644
--- a/yfinance/base.py
+++ b/yfinance/base.py
@@ -768,7 +768,7 @@ def history(self, period="1mo", interval="1d",
         if capital_gains is not None:
             capital_gains = utils.set_df_tz(capital_gains, interval, tz_exchange)
         if start is not None:
-            startDt = quotes.index[0]
+            startDt = quotes.index[0].floor('D')
             if dividends is not None:
                 dividends = dividends.loc[startDt:]
             if capital_gains is not None: