It should be fine.
When you open it if it smells like Cider it will be ok to drink.and you won't get ill.
If it smells off then dispose of it.
We used to drink cider,when I was a boy(back in the 1930's) that had been opened and the stopper put back,and it was 2 years old,and we never got ill(just tipsy.LOL)
All this was before we had anything like sell by/drink by dates.