The country that wakes up first in the world depends on how you define "wakes up."
If you mean the country where the sun rises first, then it's Kiribati, a small island nation in the central Pacific Ocean. The International Date Line passes through Kiribati, meaning the easternmost part of the country sees the sun first in the world.
If you mean the country with the earliest average wake-up time, then according to World Population Review, Colombia and Costa Rica are tied for the earliest wake-up time, with an average of 7:00 AM.
However, it's important to remember that these are just averages, and people in every country wake up at different times.
Ultimately, the "first country to wake up" depends on your definition of "wakes up."