In which country is it the year 2018?
The country where it is currently the year 2018 is Ethiopia.
Ethiopia uses the Ethiopian calendar, a solar calendar based on the Coptic calendar. This calendar is seven to eight years behind the Gregorian calendar, so when the rest of the world is in 2025, it is currently 2018 in Ethiopia. The Ethiopian calendar also has 13 months, with 12 months of 30 days and one month of 5 or 6 days.
Source
https://www.youtube.com/watch?v=MVWXfMW4F7U
https://www.threads.com/@beliproduk.official/post/DO8YR7Hkj8Q