"I know when the party is."
Translation:Yo sé cuándo es la fiesta.
Yes, because it's part of the original question, "¿Cuándo es la fiesta?"
This es vs esta is ridiculous. Once you think you got it they change it.
The way they typically teach it is. I still got caught up on a little but if you're remember. If I got my facts straight
- ser is for describing charterist and usally goes with nouns while
- estar usaly goes with adverbs deals with location and how you are doing.