Can I add the file last update date to the file name?

[BillH99999]

I searched around, but didn't find anything on this. Is there a way in BRU to add the last update date for a file to the file name?

Thanks,
Bill

[Admin]

Quick (no-script) way

- Use Auto Date (8).
- Set Date Type = Modified.
- Choose Format (one of the built-ins or a custom format), Seg./Sep./Cent. as needed.
- Choose Prefix or Suffix.
- Preview the New Name column, then click Rename.

Notes:
- If you are also changing file timestamps as part of the same operation and want to use the new timestamp value, choose Modified (New).
- For photos you may prefer Item Date or EXIF Taken types (EXIF available only for JPG/TIFF/NEF/CR2).
- Preview first and back up important files before running bulk operations.

Advanced / custom formatting (JavaScript)
If you need a custom timestamp format not available in Auto Date, use the Javascript renaming (Special (14)). Example that prepends a Modified timestamp including time:

var d = object("modified");
newName = formatDateTime(d, "YYYY-MM-DD_HH-mm-ss") + "_" + name;

(Then run the JS renamer. newName must not include the extension.)

[BillH99999]

Works like a charm.

Thanks!!

[TheGhost78]

If you want to remove an existing date or date time and update it to the latest modified date or date time, in the format Filename, 2025-09-03 or Filename, 2025-09-03 10.38.10:

RegEx (1)
Match: (.+)(, \d{4}-\d{2}-\d{2})( \d{2}\.\d{2}\.\d{2})?$
Replace: \1

Auto Date (8)
Mode: Suffix
Type: Modified (Current)
Format: Custom
Sep.: , (comma space)
Custom: %Y-%m-%d or %Y-%m-%d %H.%M.%S

It would work for files that do not currently have a date or date time as well, as the RegEx (1) part simply won't do anything to those filenames but the Auto Date (8) part will still fire.
If you want to use different separators, just change them in both the Match portion of RegEx and the Sep. and Custom portions of Auto Date.