Creation date (tag)

From SnapMap

creation_date=<date> is used for imaginative renderings of scenes, such as historical reconstructions and architectural perspectives, where the date depicted date is different from the date the picture was created. In order to facilitate the presumed majority of UAs that care less about creation dates that depiction dates, we still use date (tag) for the date the image depicts.

Here's an example of date tags for an image created in 1961 of Roman London:

date=1961
creation_date=150

By contrast, an architectural perspective of a building not yet built would have creation_date earlier than date.