Wikipedia says it’s “the period of twilight each morning and evening when the sun is a significant distance below the horizon and the residual, indirect sunlight takes on a predominantly blue hue” .
Neither full daylight nor complete darkness, these 40 minutes are pure bliss.
Chase the blue, seize this hour! Plenty in London.
Blue Hour @ Putney Bridge in SW London
Try this on a sunny Sunday afternoon: walk on the south bank from Putney Bridge to Hammersmith Bridge. Start around 4 pm (in summer, 1 pm in winter) to make the most of the sun. And sunsets. At Hammersmith Bridge cross and stop at a river pub, get some more sun while hugging some zingy blonde ale. When appropriate to leave, bid goodbye and walk on the north bank back to Putney. The sun sets on your right side, and will warm your back. I’m not gonna tell you much about what you’ll see along this rather short but mighty walk. But yes, it’s a story with gardens, forests, new developments, old pubs, palaces, churches, swans, wild ducks, boats and strolling humans. Joy! I mean, enjoy!
The agony of choice