Which Saint Petersburg summer phenomenon, occurring from late May to mid-July, is celebrated with concerts, the 'Scarlet Sails' graduation event, and near-continuous twilight?

• A Aurora Festival
• B White Nights ✓
• C Northern Lights
• D Midnight Sun

The White Nights (Белые ночи) occur due to the city's high latitude; the Scarlet Sails show on the Neva River features a ship with red sails and elaborate fireworks.