Is spring the new summer?

Following the second warmest winter on record two natural events suggest we have leapfrogged spring and moved straight to summer, a conservation charity said today.

Following a weekend where some parts of the UK basked in temperatures 10C above the seasonal average, the Woodland Trust said flowering hawthorn and the return of migrating swifts indicated that summer had arrived a month earlier than usual this year.
The trust said sightings of hawthorn flowers and swifts, made by the public as part of the Springwatch survey it runs annually with the BBC, suggest climate change is having an impact on the timing of our seasons.

Guardian