Show HN: Maximise your Holiday – UK

I built a website (https://maximiseyourannualleave.co.uk) that helps to plan 2018 annual leave in the UK. For example, if you want to book 15 days, you have: - 10 different dates to have 26 days off - 16 different dates to have 25 days off - 31 different dates to have 24 days off Is that useful for someone?