Do I need to upgrade to Internet Identity 2.0 before a certain date?
No. Internet Identity is a decentralized service, meaning you control your own upgrade timeline. There is no mandatory deadline. The upgrade will remain available indefinitely.
However, we strongly recommend upgrading as soon as possible. This ensures you can access newer applications (for example caffeine.ai) and be ready when existing services transition to Internet Identity 2.0.
The above is from the support docs.