The contest the Three Day Weekend (aka TDW) Contest and it looks like you have plenty of time to jump in.
Here is the link to the rules:
http://www.podxs070.com/o7o-club-sponsored-contests/three-day-weekendThe contest ends at 2359 on May 29 which is 6:59PM CDT Sunday evening.
(Suggestion: try Googling for things like "070 tdw contest". That's what I did and found the answer in about 5 seconds.... if that long.)