Most Android devices have cameras on them, which turned every one of them into shutterbugs. As a result, Android devices are packed with photos that are in no particular order. Good luck trying to find that one that you are looking for when you need it.
I have experienced this problem several times, and you can occasionally find me scrolling and finger swiping all my photos until I find the one that I was looking for.
However, if I know that date when the picture was taken (which I usually do) I can find the photo in question easily with Photos Day Gallery.
Photos Day Gallery seems like a relatively simple application, and it is able to sort pictures by month and date. I have tried it out, and it is amazing how it can automatically sort out by day, month, and even the year.
You can even adjust the settings for it, so you can decide whether or not to view your photos in ascending or descending order, or other great options.
Best of all, the application is free! You can get it here on the Android Market now.