[FIX] resource_booking: _get_calendar_context() with correct start / …

…timezone

resource_booking/models/resource_booking.py

@@ -3,7 +3,7 @@
 # License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
 
 import calendar
-from datetime import datetime, timedelta
+from datetime import timedelta
 
 from dateutil.relativedelta import relativedelta
 
@@ -490,14 +490,18 @@ def _get_calendar_context(self, year=None, month=None, now=None):
         :param datetime now: Represents the current datetime.
         """
         month1 = relativedelta(months=1)
-        now = now or fields.Datetime.now()
+        now = fields.Datetime.context_timestamp(self, now or fields.Datetime.now())
         year = year or now.year
         month = month or now.month
-        start = datetime(year, month, 1)
-        start, now = (
-            fields.Datetime.context_timestamp(self, dt) for dt in (start, now)
+        start = now.replace(
+            year=year,
+            month=month,
+            day=1,
+            hour=0,
+            minute=0,
+            second=0,
+            microsecond=0,
         )
-        start = start.replace(hour=0, minute=0, second=0, microsecond=0)
         lang = self.env["res.lang"]._lang_get(self.env.lang or self.env.user.lang)
         weekday_names = dict(lang.fields_get(["week_start"])["week_start"]["selection"])
         booking_duration = timedelta(hours=self.duration)