I had the same problem. There's no built in functionality. However, there's a third-party service that allows you to do just that:
Here's how it works:
You sign up with your Google account
You're asked to give OAuth access to your Google Calendar
Now you can send emails to email@example.com to create events in your calendar.
Many other ...
The email will have two parts. The "magic widget" above with some buttons to quickly answer, and the real body below starting with "You have been invited to the following event". If you click on the Yes button above firstname.lastname@example.org will be answering, but below there should be a text like "Going (email@example.com)?" with a Yes link. ...
To get events to repeat every year on a specific day of the month:
Edit the event (Click the event, click the pen icon)
Under the date range you will see a dropdown with "Does not repeat". Click it.
Select "Annually on..."
This is also available when you add a new event.
Unfortunately, I have been struggling with the same problem for the past few days. To my knowledge, there is no way to integrate Google Calendar reminders with Slack channels. What I found to be helpful, though, was the /remind feature. You can type /remind [who][what][when] in any channel to specify a reminder.
For example, if you have a meeting this Sunday ...
You can actually edit out guests you want to remove, but you can only do that in the original calendar hold where you invited each guest, even if it's a recurring meeting. When you hover your pointer over the guest's name, the X does show up at the top right corner of the name and you can uninvite them by clicking on it. After that, they do not show on any ...
One possible way I found is Zapier, it can react on finishing a Toggl activity and copy it to your Google calendar. It has some options and all, it's convenient but the free Zapier account only allows a certain number of actions per month so it's not really a long-term solution for heavy togglers.
Other automation systems can be found as well but I suspect ...