All year round; throughout the year — continuing or true during the entire year.
この地域は一年中温暖な気候だ。
This region has a mild climate all year round.
果物は一年中手に入るわけではない。
Fruits are not available all year round.
彼女は一年中忙しい仕事をしている。
She has a busy job throughout the year.