The Photos app’s timeline feature is an easy way to delete photos from your iPhone based on date. From your library, you can browse and delete photos by day, month, and year. Here’s how to use it to delete recent photos:
Open the Photos app
Tap Library.
At the bottom of the screen beside All Photos, tap Days.
Tap Select in the top-right corner of the screen.
Tap Select All in the bottom-left corner of the album thumbnail to select all the photos saved during that day.
Tap the Trash icon in the bottom-right corner of the screen and confirm the deletion.