When PDF Incvoice show wrong date in Magento 2.3.5 then follow below steps.

Step 1 : Go to this path /vendor/magento/framework/Stdlib/DateTime/Timezone.php

Step 2 : Go to line no. 196 (approx).

Step 3 : Comment this below function.

public function scopeDate($scope = null, $date = null, $includeTime = false)
{
    ...
    ...
}

Step 4 : Place this below mention function after above commented function.

public function scopeDate($scope = null, $date = null, $includeTime = false)
{
    $timezone = new DateTimeZone(
        $this->_scopeConfig->getValue($this->getDefaultTimezonePath(), $this->_scopeType, $scope)
    );
    switch (true) {
        case (empty($date)):
            $date = new DateTime('now', $timezone);
            break;
        case ($date instanceof DateTime):
        case ($date instanceof DateTimeImmutable):
            $date = $date->setTimezone($timezone);
            break;
        default:
            $date = new DateTime(is_numeric($date) ? '@' . $date : $date);
            $date->setTimezone($timezone);
            break;
    }

    if (!$includeTime) {
        $date->setTime(0, 0, 0);
    }

    return $date;
}

Step 5 : After that run below mentioned commands

- php bin/magento setup:upgrade
- php bin/magento cache:clean

That’s it.

After performing above steps, you can check the PDF Invoice. You will find the appropriate date in your PDF Invoices.