Calendar

The calendar and events functionality is group in a Schedule object.

A Schedule instance can list and create calendars. It can also list or create events on the default user calendar. To use other calendars use a Calendar instance.

These are the scopes needed to work with the Schedule, Calendar and Event classes.

Raw Scope	Included in Scope Helper	Description
Calendars.Read	calendar	To only read my personal calendars
Calendars.Read.Shared	calendar_shared	To only read another user / shared mailbox calendars
Calendars.ReadWrite	calendar_all	To read and save personal calendars
Calendars.ReadWrite.Shared	calendar_shared_all	To read and save calendars from another user / shared mailbox

Working with the Schedule instance:

import datetime as dt

# ...
schedule = account.schedule()

calendar = schedule.get_default_calendar()
new_event = calendar.new_event()  # creates a new unsaved event
new_event.subject = 'Recruit George Best!'
new_event.location = 'England'

# naive datetimes will automatically be converted to timezone aware datetime
#  objects using the local timezone detected or the protocol provided timezone

new_event.start = dt.datetime(2019, 9, 5, 19, 45)
# so new_event.start becomes: datetime.datetime(2018, 9, 5, 19, 45, tzinfo=<DstTzInfo 'Europe/Paris' CEST+2:00:00 DST>)

new_event.recurrence.set_daily(1, end=dt.datetime(2019, 9, 10))
new_event.remind_before_minutes = 45

new_event.save()

Working with Calendar instances:

calendar = schedule.get_calendar(calendar_name='Birthdays')

calendar.name = 'Football players birthdays'
calendar.update()

q = calendar.new_query('start').greater_equal(dt.datetime(2018, 5, 20))
q.chain('and').on_attribute('end').less_equal(dt.datetime(2018, 5, 24))

birthdays = calendar.get_events(query=q, include_recurring=True)  # include_recurring=True will include repeated events on the result set.

for event in birthdays:
    if event.subject == 'George Best Birthday':
        # He died in 2005... but we celebrate anyway!
        event.accept("I'll attend!")  # send a response accepting
    else:
        event.decline("No way I'm coming, I'll be in Spain", send_response=False)  # decline the event but don't send a response to the organizer

Notes regarding Calendars and Events:

1. Include_recurring=True:

   It’s important to know that when querying events with include_recurring=True (which is the default), it is required that you must provide a query parameter with the start and end attributes defined. Unlike when using include_recurring=False those attributes will NOT filter the data based on the operations you set on the query (greater_equal, less, etc.) but just filter the events start datetime between the provided start and end datetimes.

2. Shared Calendars:

   There are some known issues when working with shared calendars in Microsoft Graph.

3. Event attachments:

   For some unknown reason, Microsoft does not allow to upload an attachment at the event creation time (as opposed with message attachments). See this. So, to upload attachments to Events, first save the event, then attach the message and save again.