Every year a few teams out of 500+ have a very disappointing end to their VSF participation. Often I suspect they did not review the Rules and Help sections.
In the Help and Rules sections, the absolute necessity of uploading and testing projects well before the closing date is emphasized. Indeed, projects should be uploaded and tested every time any change is made. Under no circumstances should the upload and testing be left to the last few days. Even experienced website builders do continuous uploading and testing to get things working correctly.
The test to see if things are working, is to browse to the URL
If the project does not display, then the judges can not see it.
It is simply not fair to extend the date/time past the closing time set months ago.