Translation:Today is not Sunday.
It is not Sunday. The 'it' must show up. Otherwise the sentence is not corrtect
星期日 is mainly used in writing or formal situations. 星期天 just sounds a bit more lively or casual.
I think my answer "It is not Sunday today" should also be accepted as correct.
It's not Sunday came up as incorrect! Come on Duolingo, what are you playing at!
Can someone help me pronounce the translation for Sunday? The audio pronounces it very quickly and I can't understand it easily.