Luton is a year-round transit stop and can be visited at any time. The market is best on weekdays when stalls are fully open. Summer is the best time to visit Wardown Park and the Stockwood Discovery Centre gardens. Luton Carnival, usually held in May or June, is one of the UK's largest Caribbean carnivals and worth timing a visit around if you can — it brings the town to life in a way the rest of the year rarely does.