The Bing images are sourced from different providers. Some are more current than others. If you have an image URL of, say http://ecn.t3.tiles.virtualearth.net/tiles/a1202022331312023.jpeg?g=587&mkt=en-us You can retreive the HTTP headers using a browser plugin or an Unix commandline tool like $ HEAD 'http://ecn.t3.tiles.virtualearth.net/tiles/a1202022331312023.jpeg?g=587&mkt=en-us' This will return, among other things, a line that reads X-VE-TILEMETA-CaptureDatesRange: 6/17/2006-7/14/2006 Which tells you that this specific tile was created from an image taken about 4.5 years ago. OSM editors don't currently show that information but I assume that in the long run, ways will be found to make it readily availalbe.

The Bing images are sourced from different providers. Some are more current than others. If you have an image URL of, say http://ecn.t3.tiles.virtualearth.net/tiles/a1202022331312023.jpeg?g=587&mkt=en-us You can retreive the HTTP headers using a browser plugin or an Unix commandline tool like $ HEAD 'http://ecn.t3.tiles.virtualearth.net/tiles/a1202022331312023.jpeg?g=587&mkt=en-us' This will return, among other things, a line that reads X-VE-TILEMETA-CaptureDatesRange: 6/17/2006-7/14/2006 Which tells you that this specific tile was taken about 4.5 years ago. OSM editors don't currently show that information but I assume that in the long run, ways will be found to make it readily availalbe.