iPhone 8 doesn’t recognize pin

[potent canopy]

I have saved this iPhone 8 as a display phone and I just use it rarely. But I turned it on and now doesn’t recognize my pin and I noticed that time and date is wrong August 2025. I tried to put my pin multiple times and now is locked. What should I do please

[solemn pumice]

Are you sure you're typing the passcode right? If you can't remember the passcode you may need to restore the phone.

Also the date being set to August 2025 usually indicates the phone hasn't had any charge since around August 2025.