Today meaning June 3, to be perfectly clear. I'm writing this Tuesday night but will set it to publish after midnight on June 3. When I got the email announcing this (and offering a $3 discount) from the Spirit of the Marathon movie folks, it said "today" but today was still June 2, in my time zone.
Lucky for me Wednesday is a running day anyway, so I can participate without going out of my way to do so. Here is the website, in case you want more information.
Have a good run, everyone!