Should I use dashes, underscores, or spaces in folder names?

Any of them work; consistency matters more than the choice. Dashes in the date (2019-07-04) are the de facto standard because it's the ISO 8601 format, which sorts correctly and is unambiguous across regions — unlike 07/04/2019, which reads as two different dates depending on the country.

What if I don't know the exact date — old prints, digitized tapes?

Use your best estimate at the precision you actually have: a year alone (1998), or a year and season if you can narrow it that far (1998-summer). An approximate date that's roughly right is far more useful than no date at all, and you can always tighten it later if you find a clue.

Do I need to rename the individual photo files too?

No. Put your naming effort into folders, which number in the dozens or hundreds, not individual files, which number in the tens of thousands. The camera's original filename and embedded date are enough once the folder gives the file its context.

The Folder Naming System That Survives 20 Years

Q: What's the best photo folder naming convention?

A year folder, containing a dated event folder inside it: 2019/2019-07-04 Lake House. The date prefix (YYYY-MM-DD) sorts correctly in any file browser regardless of app or OS, and the event name lets a human recognize what's inside without opening it.

Q: What about an event that spans two days, or crosses New Year's Eve?

Use the start date. A trip from December 30 to January 2 becomes one folder, dated 2019-12-30, filed under the year it started in. Don't split one event across two year folders just because the calendar flipped mid-trip.

A pile of old photo albums and loose prints spread across a table — Photo by Thiago José Amaral via Pexels

Most folder-naming advice is written for a project that lasts a few months. A family photo archive has to survive apps you haven't installed yet, operating systems that don't exist yet, and — the part people underestimate — your own memory of why you named something the way you did. The system below isn't clever. That's the point: cleverness ages badly, and this hasn't needed to change in the twenty years it's already been tested against.

The pattern

A folder per year. Inside it, one folder per event, named with the date first, then the event name.

Common, and it breaks down

New folder (2)/ IMG_2029/ vacation!!/ recent/ Mom's phone dump/

This works

2019/ 2019-03-10 Grandma's 80th/ 2019-07-04 Lake House/ 2020/ 2020-01-01 New Year Cabin/

Two things are doing all the work here. The date prefix (YYYY-MM-DD) means the folder sorts correctly in any file browser, on any OS, forever — no app needs to understand your naming scheme for the order to come out right, because plain alphabetical sort already gets it right. The event name after the date means a human skimming the list recognizes what's inside without opening a single folder.

A good folder name isn't for the app reading it today. It's for the version of you, ten years from now, who has completely forgotten what "IMG_2029" was.

Why the date goes first, not last

"Lake House 2019-07-04" and "2019-07-04 Lake House" look similar, but only one of them sorts correctly next to every other folder in that year. Put the date first and the whole year folder falls into calendar order automatically. Put it last, or omit it, and you're relying on either manual reordering or an app clever enough to parse dates out of arbitrary text — a dependency this system is specifically designed not to need.

Edge cases, handled plainly

An event spans two days, or crosses New Year's Eve

Use the start date, one folder. A trip from December 30 to January 2 is 2019-12-30 New Year's Trip, filed under 2019 — the year it started in — even though part of it happened in January. Don't split one continuous event across two year folders just because the calendar flipped partway through.

You don't know the exact date — old prints, digitized home movies

Use your best estimate, at whatever precision you actually have. A bare year (1998) is far better than nothing. If you can narrow it further, do: 1998-summer is a legitimate folder name when that's genuinely as specific as the evidence gets. An approximate date you can improve later beats an empty one you'll never fill in.

Multiple contributors, years apart

This is where the pattern earns its keep the most. Because the rule is simple and doesn't depend on any one person's tagging habits or any one app's conventions, a folder a parent named in 2008 and one a teenager named in 2024 sort into the same coherent timeline without anyone reconciling anything by hand.

A folder for photos with no clear single event

It's fine to have a catch-all, but keep it dated and scoped the same way everything else is: 2021 Everyday rather than an undated "misc" folder that accumulates forever and never gets revisited.

Do you need to rename individual files too? No. Put the naming effort into folders — there are dozens or hundreds of those — not individual photo files, of which there are tens of thousands. The camera's own filename and the date embedded in the file are enough once the folder gives it context.

Why this specific pattern also happens to work great with software

This isn't a coincidence: the reason this pattern is worth formalizing is that it's close to what many families already do by instinct after a few years of dumping camera-roll photos into named folders. We went deep on the technical side of exactly why that hand-built structure turns out to be such reliable ground truth for automatic event detection in Your folder names were the training data — the "notes from the workshop" version of this same finding, if you want the engineering detail behind the practical advice above.

This is one step in a bigger process

Folder naming is Step 2 of the full system. See the complete walkthrough in How to organize decades of family photos, including what to do before this step and after it.

See how it works

FAQ

What's the best photo folder naming convention?

A year folder containing a dated event folder inside it: 2019/2019-07-04 Lake House. The date prefix sorts correctly in any file browser; the event name lets a human recognize what's inside without opening it.

Dashes, underscores, or spaces?

Any of them work — consistency matters more than the choice. Dashes in the date (2019-07-04) are the de facto standard, matching ISO 8601, which sorts correctly and is unambiguous across regions.

What about an event that spans two days, or crosses New Year's Eve?

Use the start date, one folder, filed under the year it started in — don't split a continuous event across two year folders just because the calendar flipped mid-trip.

What if I don't know the exact date?

Use your best estimate at whatever precision you have — a year alone, or a year plus season. An approximate date is far more useful than none, and you can tighten it later.

Do I need to rename individual photo files too?

No. Spend naming effort on folders, which are few, not individual files, which number in the tens of thousands — the folder gives the file its context.