I assumed you meant "In how many days is the wedding?" or "How many days to go until the wedding?" Whilst the celebrations might last a few days, a wedding in the UK lasts a couple of hours at the most.
I assumed you meant "In how many days is the wedding?" or "How many days to go until the wedding?" Whilst the celebrations might last a few days, a wedding in the UK lasts a couple of hours at the most.
Melpo, thanks for responding to the learner's question. The contents of your post are grammatically correct but, particularly as your profile states you are an English teacher, it's important that you use correct capitalisation and punctuation at all times. Learners will assume that everything you write is correct. Please see my corrections above and ensure that future posts are correctly written. Thanks.