Complex sentence: The winners of the Merit/Achievement Awards, the Kei Tomiyama Award, the Kazue Takahashi Award, and the Special Award were announced on February 21,2017 and the rest of the winners was announced on the ceremony day.
Split into simpler sentences: The winners of the Merit/Achievement Awards, the Kei Tomiyama Award, the Kazue Takahashi Award, and the Special Award were announced on February 21,2017. The rest of the winners was announced on the ceremony day.