Hello jen083,
Welcome to Apple Support Communities.
We understand that the time and date show faintly on your iPhone display. We are happy to help.
If you adjust the brightness on your display, does that help? We’d also like to have you change the wallpaper to see if that affects the time and date.
Here’s how to adjust the display brightness: Adjust the screen brightness and color on iPhone - Apple Support
"Adjust the screen brightness manually
To make your iPhone screen dimmer or brighter, do one of the following:
Here’s how to change your wallpaper: Change the wallpaper on your iPhone - Apple Support
"Add a new wallpaper for your Lock Screen or Home Screen
- In the Settings app, tap Wallpaper.
- Tap Add New Wallpaper.
- Tap Photos, People, or Photo Shuffle to choose your own photo. You can also select a wallpaper from a category like Weather & Astronomy, Emoji, Collections, or Color.
- If you want, you can customize your wallpaper further. Then tap Add."
Let us know if you have further questions.
Take care.