Simple script which gives current date to a specific text layer.

This is what I came up with from hacking away at some other code:

/*

https://community.adobe.com/t5/photoshop/simple-script-which-gives-current-date-to-a-specific-text-layer/td-p/12073216
Simple script which gives current date to a specific text layer.

Update Date Layer with Todays Date Time.jsx
Stephen Marsh, 30th May 2021 - v1.3

Script should be run on the open document event via Script Events Manager and relies on the following two conditions:
   * Document name to update (case sensitive): Project
   * Text layer name to update should be: Date

*/

#target photoshop

/* if (app.activeDocument.name.match(/^Project\.[psd|psb|tif|tiff|pdf]/) !== null) { */
if (app.activeDocument.name.match(/^Project\b/) !== null) {

    /* Time stuff */
    var myDate = new Date();
    myDate.toLocaleString('en-GB');
    var myDateString = myDate.toString();
    var time = myDateString.replace(/(.+\d{4} )(.+)( .+)/, '$2');

    /* Date stuff based on:
    https://www.w3resource.com/javascript-exercises/javascript-basic-exercise-3.php
    */
    var todaysDateTime = new Date();
    var dd = todaysDateTime.getDate();
    var mm = todaysDateTime.getMonth() + 1;
    var yyyy = todaysDateTime.getFullYear();
    if (dd < 10) {
        dd = '0' + dd;
    }
    if (mm < 10) {
        mm = '0' + mm;
    }
    var todaysDateTime = dd + '/' + mm + '/' + yyyy + ' - ' + time;

    /* Main code based on:
    https://community.adobe.com/t5/Photoshop/Script-to-Copy-Active-Layer-name-to-a-quot-Label-quot-text-layer/m-p/10659934#M268362
    Script to Copy Active Layer name to a "Label" text layer and filter out numbers, hyphens and convert word space to a carriage return
    */
    var myDoc = app.activeDocument;
    var myRulers = app.preferences.rulerUnits;
    app.preferences.rulerUnits = Units.PIXELS;

    try {
        var myLayerText = myDoc.layers.getByName('Date');
        var myText = myLayerText.textItem;

    } catch (e) {
        var myLayerText = myDoc.artLayers.add();
        myLayerText.kind = LayerKind.TEXT;
        var myText = myLayerText.textItem;
        myColor = new SolidColor;
        myColor.rgb.red = 255;
        myColor.rgb.green = 0;
        myColor.rgb.blue = 0;
        myLayerText.textItem.color = myColor;
        myText.position = [10, 30]; // Upper Left
        myText.justification = Justification.LEFT;
        myText.font = 'Courier';
        myText.size = 30;
        myLayerText.name = 'Date';

    } finally {
        myText.contents = todaysDateTime;
    }

    app.preferences.rulerUnits = myRulers;
}

else {
    // Do nothing if active document is not named "Project" (case sensitive)
}

Downloading and Installing Adobe Scripts

EDIT 29th May 2021: v1.2 – I like the suggestion of adding a timestamp from Kukurykus, so I have edited/updated the original code.

EDIT 30th May 2021: v1.3 – I have now added a conditional check that the filename is "Project" (without the quotes, case sensitive) in addition to the previous requirement that the layer name is "Date" (again, borrowing the idea from Kukurykus).

Sorry, I forgot to mention that I would use File > Scripts > Scripts Events Manager... to automatically trigger this script to run on the open document event. I would probably use a "safer" unique layer name than the generic "Date" though, just in case this was accidentally triggered by a file that contained the layer name "Date" that was not meant to be updated.

EDIT 30th May 2021: I have added a second conditional safety check so that both the filename and layer name have to be matched before the script executes.

Beg your pardon, let me see if I understand: you are looking for a script that automatically updates the name of a text layer, showing the current date or a specific date every time you open the file in photoshop? This script would allow you to automate name to date only for text layers?

May i ask what are the benefits of this solution and why text layers only?

Given that I really understood your request.

»a specific text layer«

How is the Layer identified?