diff --git a/weboob/capabilities/calendar.py b/weboob/capabilities/calendar.py
new file mode 100644
index 00000000..4376e3cf
--- /dev/null
+++ b/weboob/capabilities/calendar.py
@@ -0,0 +1,90 @@
+# -*- coding: utf-8 -*-
+
+# Copyright(C) 2010-2013 Bezleputh
+#
+# This file is part of weboob.
+#
+# weboob is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# weboob is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with weboob. If not, see <http://www.gnu.org/licenses/>.
+
+from .base import CapBaseObject, IBaseCap, StringField, DateField, IntField
+
+__all__ = ['BaseCalendarEvent', 'ICapCalendarEvent']
+
+
+def enum(**enums):
+    return type('Enum', (), enums)
+
+CATEGORIES = enum(CINE='Cinema', CONCERT='Concert', THEATRE='Theatre')
+TRANSP = enum(OPAQUE='OPAQUE', TRANSPARENT='TRANSPARENT')
+STATUS = enum(TENTATIVE='TENTATIVE', CONFIRMED='CONFIRMED', CANCELLED='CANCELLED')
+
+
+class BaseCalendarEvent(CapBaseObject):
+    """
+    Represents a calendar event
+    """
+
+    url = StringField('URL of the event')
+    start_date = DateField('Start date of the event')
+    end_date = DateField('End date of the event')
+    summary = StringField('Title of the event')
+    location = StringField('Location of the event')
+    category = StringField('Category of the event')
+    status = StringField('Status of theevent') # (TENTATIVE, CONFIRMED, CANCELLED)
+    description = StringField('Description of the event')
+    transp = StringField('Describes if event is available') # (OPAQUE, TRANSPARENT)
+    sequence = IntField('Nb of updates, the first is number 1')
+    price = StringField('Price of the event')
+
+    @classmethod
+    def id2url(cls, _id):
+        """Overloaded in child classes provided by backends."""
+        raise NotImplementedError()
+
+    @property
+    def page_url(self):
+        """
+        Get page URL of the announce.
+        """
+        return self.id2url(self.id)
+
+
+class ICapCalendarEvent(IBaseCap):
+    """
+    Capability of calendar event type sites
+    """
+
+    def list_events(self, date_from, date_to=None):
+        """
+        list coming event.
+
+        :param date_from: date of beguinning of the events list
+        :type date_from: date
+        :param date_to: date of ending of the events list
+        :type date_to: date
+        :rtype: iter[:class:`BaseCalendarEvent`]
+        """
+        raise NotImplementedError()
+
+    def get_event(self, _id, event=None):
+        """
+        Get an event from an ID.
+
+        :param _id: id of the event
+        :type _id: str
+        :param event : the event
+        :type event : BaseCalendarEvent
+        :rtype: :class:`BaseCalendarEvent` or None is fot found.
+        """
+        raise NotImplementedError()