Most mags now have “dormant” submission periods. Yes, one does open its subs page at midnight.
I can’t finish without mentioning that one brave editor, David G. Hartwell (of Tor Books), passed away yesterday. He was always nice to the new authors and visited often our Canadian SF conventions (here at Anticipation but I also met him in Boréal 2010 and Ad Astra 2014). He and his exuberantly colored ties will be missed.