Folks use things like lists, boards (Trello or white!), or bug trackers to organize tasks. Others tend to treat their inbox as a job queue or to-do list as well. However, none of those systems are meant for tasks that need to happen again and again.
Sometimes, we don't know how far in advance it would be a good time to do one of those tasks again. It's a hassle to keep postponing the task in a calendar, and if you miss the notification, there is the risk it will never remind us about it again.
After signing up with your email, you can set tasks that should be done every X number of days. The system will remind you when it is time! You can set any task name, description, and interval (every two weeks, etc.). By clicking the link in the reminder email, you can set the next time it is due.
If you call her before being reminded, or she calls you, good for you. The reminder will start counting down from that date, so the reminder date changes. This works for other tasks like:
No matter when you acknowledge the reminder, the system will keep to the initial schedule. Example: