More information on this.
When using the Bing Map API to get the metadata, i found the following tags related to the capturing date: VintageStart and VintageEnd. It is better to stamp the date range instead of the VintageEnd time
Below is one example of the metadata i got.
<response xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.microsoft.com/search/local/ws/rest/v1">
<copyright>
Copyright © 2017 Microsoft and its suppliers. All rights reserved. This API cannot be accessed and the content and any results may not be used, reproduced or transmitted in any manner without express written permission from Microsoft Corporation.
</copyright>
<brandlogouri>
http://dev.virtualearth.net/Branding/logo_powered_by.png
</brandlogouri>
<statuscode>200</statuscode>
<statusdescription>OK</statusdescription>
<authenticationresultcode>ValidCredentials</authenticationresultcode>
<traceid>
bb577d5ee8074dbea0693a0c55ae1867|CO30275838|7.7.0.0|
</traceid>
<resourcesets>
<resourceset>
<estimatedtotal>1</estimatedtotal>
<resources>
<imagerymetadata>
<imageurl>
http://ecn.t0.tiles.virtualearth.net/tiles/a021033332000300.jpeg?g=5807
</imageurl>
<imagewidth>256</imagewidth>
<imageheight>256</imageheight>
<zoommin>15</zoommin>
<zoommax>15</zoommax>
<vintagestart>2011-07-24</vintagestart>
<vintageend>2016-09-24</vintageend>
</imagerymetadata>
</resources>
</resourceset>
</resourcesets>
</response>