# Filename help
**URL:** https://community.mp3tag.de/t/filename-help/12633
**Category:** Support
**Created:** [October 26, 2011, 10:59pm UTC](https://community.mp3tag.de/t/filename-help/12633 "2011-10-26T22:59:53Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Vetinariuk](https://community.mp3tag.de/u/Vetinariuk)
#### Post date: [October 26, 2011, 10:59pm UTC](https://community.mp3tag.de/t/filename-help/12633/1 "2011-10-26T22:59:53Z")
Newbie here, a litle confused too....
Basically, I am trying to bulk rename a load of mp3's
The current name format is "YYYY.MMDD Title Text" - where Y= year M= Month & you guessed it, D= Day
I would like to rename the files with "-" between the Year, month and Day, leaving title text there too. For example "YYYY-MM-DD Title Text"
Could anyone help me with the action scripting please?
Many thanks
---
### Author:  [@DetlevD](https://community.mp3tag.de/u/DetlevD)
#### Post date: [October 26, 2011, 11:17pm UTC](https://community.mp3tag.de/t/filename-help/12633/2 "2011-10-26T23:17:31Z")
> [@Vetinari](#):
>
> ... Basically, I am trying to bulk rename a load of mp3's
> The current name format is "YYYY.MMDD Title Text" - where Y= year M= Month & you guessed it, D= Day
> I would like to rename the files with "-" between the Year, month and Day, leaving title text there too. For example "YYYY-MM-DD Title Text" ...
Action: Format value
Field: \_FILENAME
Formatstring: **$regexp(%\_filename%,'^(\d\d\d\d).(\d\d)(\d\d)\s(.+)$','$1-$2-$3 $4')**
From:
2011.1027 Title Text
To:
2011-10-27 Title Text
DD.20111027.0319.CEST
---
### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:23pm UTC](https://community.mp3tag.de/t/filename-help/12633/3 "2026-02-09T12:23:24Z")