'When you are in your late 20s it becomes really scary, but it’s surprisingly liberating once you reach it.' 'It has always has been a big moment, in my opinion,' he says. Will Gonzaga, head of event operations at The Curtain, agrees. It’s when most people mature and want something classy rather than flamboyant, it's about finesse and elegance.' 'It’s a huge milestone and milestone’s only come every few years,' explains Marc Ahmed, director of leading UK events company Scarlet Events. An occasion to welcome a new age of (fingers crossed) maturity, saving up for *gulp* a house deposit, and successfully making your own way home after a night out without Big Mac in hand. It's a time to celebrate the end of your raucous, rum and coke-filled twenties. A 30th birthday party is widely recognised as one of the biggest milestone in a young person's life, up there with graduating, first-time house buys and babies.