There may be occasions, such when travelling across time-zones, where the timestamps recorded by the camera or provided in IPTC/NAA descriptors may not be correct.
You can correct the information for Creation Date, Date (Original), Date (Modified) by double-clicking the content for those descriptors. To update more than one picture, select the images before double-clicking the descriptor content.
The option Edit Date/Time is ideal for updating a single image. If more than one picture is selected, all would be set to the exact same time.
The option Adjust Date/Time is ideal for updating a series of images. The date and time for each image will be adjusted up or down by the same offset, e.g., to acccount for time-zone changes or daylight savings time.