I just checked cache_builders/post_island.php

I didn't do a deep dive, but there is this peace of code:

PHP Code
$one_month = $html->get_date() - (86400 *30);

If you would replace that with:

PHP Code
$one_month = $html->get_date() - (86400 *1000);

That would make it a thousand days instead of 30.

As said, untested.

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