Create a basic month view

app/calendar_system/__init__.py

@@ -0,0 +1,15 @@
+class CalendarSystem:
+    __has_months__ = False
+    __has_weeks__ = False
+
+    @property
+    def day_names(self):
+        raise NotImplementedError()
+
+    @property
+    def month(self):
+        raise NotImplementedError()
+
+    @property
+    def days(self):
+        raise NotImplementedError()

app/calendar_system/gregorian.py

@@ -0,0 +1,48 @@
+from datetime import datetime, timedelta
+from flask_babel import lazy_gettext as _
+
+from . import CalendarSystem
+
+
+class GregorianCalendar(CalendarSystem):
+    __name__ = _('Gregorian')
+
+    __has_months__ = True
+
+    START_DAY = 0
+    END_DAY = 7
+
+    day_names = (
+        _('Monday'),
+        _('Tuesday'),
+        _('Wednesday'),
+        _('Thursday'),
+        _('Friday'),
+        _('Saturday'),
+        _('Sunday'),
+    )
+
+    def __init__(self, timestamp):
+        self.timestamp = datetime.utcfromtimestamp(timestamp)
+
+    @property
+    def month(self):
+        return self.timestamp.strftime("%B, %Y")
+
+    @property
+    def days(self):
+        day_list = []
+
+        start_day = self.timestamp.replace(day=1)
+
+        while start_day.weekday() > self.START_DAY:
+            start_day -= timedelta(days=1)
+
+        day_list.append(start_day)
+        current_day = start_day
+
+        while current_day.weekday() < self.END_DAY and current_day.month <= self.timestamp.month:
+            current_day += timedelta(days=1)
+            day_list.append(current_day)
+
+        return day_list