How to Bulk Rename Photos by the Date They Were Taken

IMG_4471.JPG tells you nothing. 2026-04-18 141203.jpg tells you everything, and the information needed to produce it is already inside the file — put there by the camera when the shutter fired.

The short answer

1. Open Photo Organizer in PhotoTray.
2. Point it at the folders holding the photos.
3. Choose renaming by date taken.
4. Review the preview — every old name next to its new one.
5. Apply.

Whole folders at once, nothing uploaded, and nothing renamed until you have seen what will change.

Date taken is not date modified

This is the distinction that makes the whole thing work, and getting it wrong is why most attempts at organising a photo library fail.

Date taken lives in the photo's EXIF metadata, in a field called DateTimeOriginal. The camera writes it at the moment of exposure and nothing routine ever changes it. Copy the file, email it, back it up, restore it — the date taken is still the date you took the photo.

Date modified is a file-system property, and it is reset by almost everything: copying to a new drive, syncing to cloud storage, restoring from a backup, opening and re-saving in an editor, or moving between file systems.

Sort a decade of photos by date modified and you get the day you last reorganised them. Sort by date taken and you get your actual history.

Why the built-in tools do not do this

Windows Explorer can rename a selection: pick the files, press F2, type a name. You get Holiday (1) through Holiday (340) numbered in whatever order Explorer was sorting by, with no access to the photo's date and no way to put it in the name.

PowerShell can do it properly, and if you are comfortable writing a script that reads EXIF, handles missing fields, and avoids collisions, that is a legitimate answer. Most people are not going to.

Photo library apps often rename on import, which helps for future photos and does nothing for the twelve years already on the drive.

What good naming looks like

A sortable date first, and nothing else load-bearing:

2026-04-18 141203.jpg
2026-04-18 141247.jpg
2026-04-18 143011.jpg

Year first means the file name sorts chronologically in every file browser, every operating system and every backup tool, without needing metadata at all. That is the real benefit: the organisation survives being copied somewhere that knows nothing about EXIF.

Adding a short label — 2026-04-18 141203 Cornwall.jpg — is fine. Putting the label first is not, because you lose the sort.

Filing follows naming

Once the date is being read, filing into folders is the same operation with a different output:

Photos\
  2026\
    04\
      2026-04-18 141203.jpg

A flat folder of eleven thousand photos becomes a structure you can navigate, in one pass, from information that was already in the files.

Photos with no date

Some files have no DateTimeOriginal. Screenshots usually do not. Images downloaded from the web usually do not. Anything that has been through a metadata stripper definitely does not — which is worth remembering if you scrub before you organise rather than after.

PhotoTray reports those rather than guessing. That matters: a tool that quietly falls back to the file-system date will name a folder of screenshots after the day you happened to copy them, and you will not notice until the sort order is wrong and the original information is gone.

Preview before you commit

Renaming is not difficult to undo in principle and is very tedious in practice, so the preview is not a formality. Read it for:

• Collisions — two photos taken in the same second, which happens constantly with burst mode.
• Wrong dates — a camera whose clock was never set reports 2004, and a body that travelled across time zones may be an hour out.
• Files with no date, listed separately.

Fix the obvious problems before applying rather than after.

And do it once

The reason this becomes a chore is that it is done as an occasional project. Set a rule on the folder your phone or card reader imports into — rename on arrival, file into year and month — and the library stays organised without any further attention.

The pile only ever forms because nothing is tidying it as it arrives.