This is the standard work date setup/configured by microsoft which is aligned with the demo data that is in the Cronus DB currently. You can change it will working, through My Setting as shown below image. but yes when login again it set to future date as DB.
But when you create a production environment, it doesn't affect you. Whatever date you use or set it would that.
If my answer helped you, maybe it can help others. Please verify it, so other users know it worked or helped you.
Thank you.