🐛 Fix day-shift in some Investing.com assets

Some assets such as the bond yields have incorrect timestamps shifted by one day, and doesn't seem to be related with timezone issues, as previously thought.

src/investiny/historical.py

@@ -1,13 +1,10 @@
 # Copyright 2022 Alvaro Bartolome, alvarobartt @ GitHub
 # See LICENSE for details.
 
-from datetime import datetime
+from datetime import datetime, timedelta
 from typing import Any, Dict, Literal, Union
 
-import pytz
-
 from investiny.config import Config
-from investiny.info import investing_info
 from investiny.utils import calculate_date_intervals, request_to_investing
 
 
@@ -50,9 +47,6 @@ def historical_data(
         Config.time_format if interval not in ["D", "W", "M"] else Config.date_format
     )
 
-    info = investing_info(investing_id=investing_id)
-    tz = pytz.timezone(info["timezone"])
-
     for to_datetime, from_datetime in zip(to_datetimes, from_datetimes):
         params = {
             "symbol": investing_id,
@@ -61,8 +55,12 @@ def historical_data(
             "resolution": interval,
         }
         data = request_to_investing(endpoint="history", params=params)
+        # Dates are shifted due to an Investing.com issue with returned timestamps
+        days_shift = (datetime.fromtimestamp(data["t"][0]) - from_datetime).days  # type: ignore
         result["date"] += [
-            datetime.fromtimestamp(t, tz=tz).strftime(datetime_format)
+            (datetime.fromtimestamp(t) - timedelta(days=days_shift)).strftime(
+                datetime_format
+            )
             for t in data["t"]  # type: ignore
         ]
         result["open"] += data["o"]  # type: ignore