Sort of...
Well, so it works this way:
If your b-day is before 1st of June, you can jump to next year. My one is on the 25th of May, so like less than a week before that.
I'm an immigrant as many of you know so when I finished an English school, I was meant to get into Grade 8 but the school said it was like really full and since my marks were very good they said I would be able to miss that year and get into Grade 9 straight away ;3
So that's the story