If you fall into a big sleep and after 25 year you wake, what will you do first?

turn off the alarm clock and then keep sleeping

Check The Time (Or Tha Mirror)

Woah, I Need To Sleep For 2.5 Decades And Then Find Out!

I might go to an online forum, ask people what they would do after falling asleep for 25 years, and follow their advice! (Or not follow their advice, depending on how good it is.)

Go to lichess and see what happened to the Antarctica team

Wish I’d kept sleeping ‘til I died. :)

I would check who is world champion.

Check if Carlsen’s still rocking and rolling.

Scream “5 MORE MINUTES”

Reminds me a bit of: https://lichess.org/forum/off-topic-discussion/if-you-wake-up-one-day-and-find-its-2030?page=2#20 And yes, I would still google the same thing. Though it's more likely I would eat some breakfast and get back to sleeping as long as I have the chance for it.