Set google calendar events on every Monday of the next month

SetEventsOnEveryMonday.py

from google.oauth2.credentials import Credentials
from google.auth.transport.requests import Request
from google_auth_oauthlib.flow import InstalledAppFlow
from googleapiclient.discovery import build
from datetime import datetime, timedelta
import calendar, os

# If modifying these scopes, delete the file token.json.
SCOPES = ['https://www.googleapis.com/auth/calendar.events']

creds = None
# The file token.json stores the user's access and refresh tokens, and is
# created automatically when the authorization flow completes for the first
# time.
if os.path.exists('token.json'):
    creds = Credentials.from_authorized_user_file('token.json', SCOPES)
# If there are no (valid) credentials available, let the user log in.
if not creds or not creds.valid:
    if creds and creds.expired and creds.refresh_token:
        creds.refresh(Request())
    else:
        flow = InstalledAppFlow.from_client_secrets_file(
            'credentials.json', SCOPES)
        creds = flow.run_local_server(port=0)
    # Save the credentials for the next run
    with open('token.json', 'w') as token:
        token.write(creds.to_json())

service = build('calendar', 'v3', credentials=creds)

# Replace with your calendar ID
calendar_id = '###'

year = datetime.now().year
month = datetime.now().month + 1 if datetime.now().month < 12 else 1

# To set the event every monday, calculate the first Monday of the month
first_day, _ = calendar.monthrange(year, month)
m = datetime(year, month, 1) + timedelta(days=(calendar.MONDAY - first_day) % 7)

events = []
# loop while the month has not ended
while m.month == month:
    e = datetime(year, month, m.day, 9, 0, 0)
    event = {
        'summary': 'test',
        'start': {
            'dateTime': e.isoformat(),
            'timeZone': 'Asia/Tokyo',
        },
        'end': {
            'dateTime': (e + timedelta(hours=4)).isoformat(),
            'timeZone': 'Asia/Tokyo',
        },
    }
    created_event = service.events().insert(calendarId=calendar_id, body=event).execute()
    print("created:", event)
    m += timedelta(days=7)