I have subscribed to Codeforces Google Calendar https://codeforces.com/calendar so that I don't miss any codeforces contests. I have also added notifications (for 6 hrs and 1 hr before) as email and on the phone.
But recently, codeforces stream started streams (I am not interested in attending them), and I am getting unnecessary notifications on my mobile and Gmail inbox.
I suggest the codeforces admins to have a separate google calendar for the streams, as not everyone wants to attend them.
UPDATE : You can access separate google calendars of different coding websites here https://clist.by/resources/. It also has codeforces google calendar, and not with the streams.