"The vacation is in November."
Translation:Las vacaciones son en noviembre.
I thought this was so too, however tried 'La vacación" just to see. It was accepted. I tried 'Google Translate' [ and I know it's literal] to discover that 'La vacación' is given as 'The vacation' and 'las vacaciónes' as 'the hoildays'. There's nothing quite like confusing the issue!