December 16 is suppose to the usual the end of the Double Issue, However, Dec. 21 will be leaked earlier due to the holidays. Yes, there should be two releases within the 16th and 21st.
Dec. 16= Monday
Dec. 21 = that following Saturday.
But that means only one more chapter since we already have the Monday release… :( What about the thing that is being released officially on the 27th? That is not a JUMP issue I presume? So one more chapter and then the next one beginning of January?
After doing some searching on the Forums i managed to find the schedule. Silverblades original post.
This is the list of breaks Oda takes every year. Next weeks break is there because issue #52 is the last issue of the 2013 and the next issue will be the first issue of 2014.
However, the 2013 and 2014 in question aren't calendar years but publishing years which means there will be four more magazine issues until the end of the calendar year.
See publishing schedule.
December-January Schedule:
#01 : December 02.
#02 : December 09.
#03 : December 16.
#04-05 : December 21 (Saturday because Monday 23 is a Public Holiday).
Jump Next! 2014 Winter : December 27.
#06-07 : January 04.
#08 : January 20.
These are official street dates so if you want that translated to spoiler scanlation dates it will quite likely be like this:
#01 : November 26.
#02 : December 03.
#03 : December 10.
#04-05 : December 16 (Saturday because Monday 23 is a Public Holiday).
#06-07 : December 30.
#08 : January 14.
Edit: For Australians add 1 more day to the street date :)