I've seen a lot of women's day greetings in China (Weibo) saying "goddesses" when referring to women. is that an accurate translation?

Vedi una traduzione

Yes, it's accurate. There's a tendency in recent years of exaggerating our fondness and admiration to other people. For example, we refer to female movie stars or singers that we like as "goddesses", and male stars, (redundantly) "male gods", instead of just "gods" :). These terms are usually used only upon the good-looking. Then the application of the terms expanded; you may call whoever you love as a goddess or a male god. I think this is why, in some people's words, the Women's Day has become a "Day of the Goddess", i.e. the day of the woman/women you love. This is not formal, just an expression.