The event runs for 24 hours - from 1900 UTC on January 28th to 1900 UTC of January 29th.
The Rules can be found HERE.
This event was started by SPAR, who gave up running the event last year when the Winter Field Day Association took it over.
This is a chance to practice our Emcomm and deployment skills under cold weather conditions, instead of the bugs and oppressive high heat of June. As the association states: "Not all emergencies happen in the good weather".
If you're on Facebook, have a look at the WFD Page...HERE. There's over 1500 members to exchange notes and ideas with.