diff --git a/calendar/teachingdates/calendars/basecalendar.py b/calendar/teachingdates/calendars/basecalendar.py
index 75182d4..9f08493 100644
--- a/calendar/teachingdates/calendars/basecalendar.py
+++ b/calendar/teachingdates/calendars/basecalendar.py
@@ -29,14 +29,6 @@
     don't provide teaching period details, it generates dates for the
     current ISO-8601 year.
     """
-    weeks = []
-    lecture_offsets = []
-    skipped_lectures = []
-    period = None
-    period_name = None
-    paper = None
-    end_of_week = None
-    year = datetime.date.today().year
 
     def __init__(self, config):
         self.config = config
@@ -69,46 +61,12 @@
                 self.mondays[-1].isocalendar()[1] # last ISO week
             ]}])
         self.calendars["iso"] = self.generate_calendar("iso")
+
+        self.lecture_offsets = []
+        self.skipped_lectures = []
         if self.config.paper:
             self.update_lectures(self.config.get_paper_config(self.config.paper))
 
-        # print("mondays (__init__): ", self.mondays)
-        # print("period_weeks (__init__): ", self.period_weeks)
-        # print("calendars (__init__): ", self.calendars)
-
-    # def __init__(self,
-    #              year,
-    #              period,
-    #              paper,
-    #              period_name="ISO",
-    #              end_of_week=None,
-    #              period_config=None,
-    #              paper_config=None,
-    #              config=None):
-    #     self.year = year
-    #     self.period = period
-    #     self.period_name = period_name.replace(" ", "")
-    #     self.paper = paper
-    #     self.end_of_week = end_of_week
-    #     self.config = config
-
-    #     # self.env.filters.update(filters)
-
-    #     # This is likely to end up with one week too many at the end,
-    #     # but that doesn't matter as there will never be any teaching
-    #     # during the last week of December!
-    #     cal = calendar.Calendar().yeardatescalendar(self.year, width=12)
-
-    #     self.mondays = [week[0] for month in cal[0] for week in month]
-    #     self.mondays = list(dict.fromkeys(self.mondays))
-    #     if period_config:
-    #         self.update_weeks(period_config["weeks"])
-    #     else:
-    #         last_week = datetime.date(self.year, 12, 28).isocalendar()[1]
-    #         self.update_weeks([{"iso": [1, last_week]}])
-    #     if paper_config:
-    #         self.update_lectures(paper_config["lectures"])
-
     def make_week(self, week_type, start, end=None):
         end = start if end is None else end
         return [
@@ -118,22 +76,6 @@
                 self.mondays[w].day)
             for w in range(start - 1, end)]
 
-    # def teaching_date(self, period, week, offset=0):
-    #     pass
-
-    # def update_weeks(self, week_list):
-    #     for w in week_list:
-    #         for t, r in w.items():
-    #             if t == "teach":
-    #                 self.weeks += self.make_week(TeachingWeek, r[0], r[1])
-    #             elif t == "break":
-    #                 self.weeks += self.make_week(BreakWeek, r[0], r[1])
-    #             elif t == "iso":
-    #                 self.weeks += self.make_week(IsoWeek, r[0], r[1])
-    #             else:
-    #                 print("{prog}: warning: ignored unknown week type "
-    #                       "'{type}'.".format(prog=PROG, type=t))
-
     def generate_period_weeks(self, week_list):
         weeks = []
         for w in week_list: