Microsoft Teams Exploratory end date

I would like to know the date of my Microsoft Teams Exploratory license. https://docs.microsoft.com/en-us/microsoftteams/teams-exploratory#how-long-does-the-teams-exploratory-experience-last state it will end on the yearly anniversary date or the subsequent year after the first end-user activates the Microsoft Teams Exploratory experience licenses.

Our tenant uses month to month licenses. How can i find the start date of the first license? 

Or better, when this license will stop.

The product license page state a expire date of Expires May 11, 2853. This seems to be in every tenant on the internet.