Having issues setting up UTC 0 Timezone with PrimeReact Calendar.

[FurkanCodes]

In my application, I have a calendar component that dispatches start and end dates. However, the time conversion is not working as I wanted it to.
It sends in GMT+3 which is absolutely fine, so I wrote a small UTC Conversion method but due to reasons that I cannot quite understand it does not convert the time properly. It works for Material UI's calendar. Why would this be happening? Does PrimeReact handle calendar output different than MUI for example?

This is how I am converting the time

UTCDate = (utcDate: Date) => {
        const _utcDate = new Date(utcDate.toISOString());
        const gmtOffset = _utcDate.getTimezoneOffset();
        const hours = Math.floor(gmtOffset / 60);
        _utcDate.setHours(_utcDate.getHours() - hours, _utcDate.getMinutes(), 0, 0);
        return _utcDate;
    };
    

    <Calendar showTime name="startDate" onChange={(date) => handleDate(date, "startDate")}></Calendar>
      <Calendar showTime name="endDate"   onChange={(date) => handleDate(date, "endDate")}></Calendar>
                       

and This is my function;

       const handleDate = (date, field) => {
        const a = helperMethods.UTCDate(date);
        console.log(a);
// I am dispatching to my redux store
         dispatch(setStuff({ ...createApplicationRequestModel, [field]: a }));
    };

So far this returns;

utcDate.toISOString is not a function, then I try converting the value from Calendar to new Date, the error disappears but then my intended functionality still does not work.

Any guidance or help is appreciated, I would like to stick to PrimeReact's calendar if possible

[melloware]

Duplicate of #4128