A system for determining a time that a file was created and associating an ID with the file based on the file creation time is disclosed. The system adjusts the creation time by a time zone offset. In the case of image files, the file creation time may be based on information associated with the image: (1) by the camera that took the picture (exchangeable image file data); (2) when the photo was last modified in memory (file modification time data); (3) based on the raw date and time the photo file was created (file date-time data); and (4) when the photo was imported onto a client device. The system may rename the file with this adjusted creation time to create a standardized name. As a result, the standardized name provides a filename nomenclature that is based on the actual or estimated time of when the file was created.