2. Every photo taken by a digital camera will have "EXIF" information, including shooting date, exposure parameters and resolution. If you only need to browse the photos on your computer to see the date when the photos were taken, you can use the photo browsing software "ACDsee" installed on almost every computer to open your photos, press Enter to switch to the mode of "Full View Viewer", then right-click the photos and select "Properties" to view the "EXIF" information of the photos.
3. Later, you can add time to photos through editing software, such as using "Easy Watermark" software.