I posted this last week on the regular TTOL SXM forum but thought I'd post it here, too, for those who might be interested and have missed it previously.
In checking a reservation for an up-coming trip, I noticed on the JB home page they will be publishing their next set of ticketing dates at 2:00 pm ET on Sunday, July 16th for dates through May 1, 2018. This should make all of us Feb./March/April travelers happy.