1. A day characterized by bright sunlight, clear skies, and pleasant weather; also used metaphorically to describe a day filled with joy, happiness, or positive events
It was a radiant day, perfect for a picnic in the park.
Era um dia radiante, perfeito para um piquenique no parque.
2. A day when someone appears especially happy, glowing, or full of joy
She looked beautiful on her wedding day, it was truly a radiant day for her.
Ela parecia linda no seu dia de casamento, foi verdadeiramente um dia radiante para ela.