Update date converter script

I am wanting to update the script below with some additional functionality.

Currently the script converts UK date formats dd/mm/yyyy into a more readable format.

Example:

01/02/2024 becomes Thursday 1st February 2024

I would like to update the script  to also be able to handle date ranges.
With the current script it does the below which is ok except for the repeated month and year.

Example:

01/02/2024 – 07/02/2024 becomes Thursday 1st February 2024 – Wednesday 7th February 2024

I would like the result to be Thursday 1st  – Wednesday 7th February 2024
So whenever there is a repeat of month and/or year within a range the first instance it is removed or ignored?

01/02/2024 – 07/05/2024 becomes Thursday 1st February – Tuesday 7th May 2024

Not sure if the script can be updated to do this or weather a new script is needed.

Any help appreciated.

#target indesign;

/*
    by Oleh Melnyk at 5 April 2017
    requested at https://forums.adobe.com/message/9436296#9436296
	
    Edited By :- Manan Joshi
    Edited the date format to dd/mm/yyyy or d/m/yyyy

    Jan 08 - 2023: Updated to include ordinal indicators st, th, rd
*/
try {
//> START OF doUndoWraper
if (parseFloat(app.version) < 6) // "app.version < 6" if it's running under an earlier version than CS4, as earlier versions don't support "Undo" in scripts
    doUndoWrapper();
else
    app.doScript(doUndoWrapper, ScriptLanguage.JAVASCRIPT, undefined, UndoModes.ENTIRE_SCRIPT, "Change Date Format");
//< END OF doUndoWraper

function doUndoWrapper(){
    function toUnique(a, b, c) { //array,placeholder,placeholder
        b = a.length;
        while (c = --b)
            while (c--) a[b] !== a[c] || a.splice(c, 1);
        return a // not needed ;)
    }
    
    function convertDateFormat(date) {
        var t = date.split("/");
        date = t[1] + "/" + t[0] + "/" + t[2];
        var objDate = new Date(date);
        var monthName = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
        var dayName = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
        var day = objDate.getDate();
        var suffix = "th";
        if (day % 10 === 1 && day !== 11) {
          suffix = "st";
        } else if (day % 10 === 2 && day !== 12) {
          suffix = "nd";
        } else if (day % 10 === 3 && day !== 13) {
          suffix = "rd";
        }
        return dayName[objDate.getDay()] + " " + day + suffix + " " + monthName[objDate.getMonth()] + " " + objDate.getFullYear();
    }

    app.findGrepPreferences = app.changeGrepPreferences = NothingEnum.nothing; // clear settings

    app.findChangeGrepOptions.includeLockedLayersForFind = false; // search in Locked Layers
    app.findChangeGrepOptions.includeLockedStoriesForFind = false; // search in Locked Stories
    app.findChangeGrepOptions.includeHiddenLayers = false; // search in HiddenLayers
    app.findChangeGrepOptions.includeMasterPages = false; // search in Master Pages
    app.findChangeGrepOptions.includeFootnotes = true; // search in Footnotes

    app.findGrepPreferences.findWhat = "\\d{1,2}\/\\d{1,2}\/\\d{4}";

    var whereToSearch = app.activeDocument; // default - search in entire document
    var foundPrep = whereToSearch.findGrep();
    
    if (foundPrep.length === 0) {
        alert("No matching date formats found in the document.\ndd/mm/yyyy or d/m/yyyy");
        return; // No dates found, so exit the script.
    }

    var foundElements = [];
    for(var x = 0; x < foundPrep.length; x++){
         foundElements.push(foundPrep[x].contents); 
    }

    var foundUnique = toUnique(foundElements);

    for(var i = 0; i < foundUnique.length; i++){                
        var option = foundUnique[i];                
        app.findGrepPreferences.findWhat = option;           
        app.changeGrepPreferences.changeTo = convertDateFormat(option);        
        whereToSearch.changeGrep();        
        app.findGrepPreferences = app.changeGrepPreferences = NothingEnum.nothing; // clear find what and change to field        
    } 
}
} catch (error) {
    alert(error.message);
    }