FWIW here's when they announced the concerts in the past. Usually no later than the 15th, this coming week is most likely.
Jan 8, 2020
Jan 10, 2019
Jan 9, 2018
Jan 12, 2017
Jan 5, 2016
Jan 12, 2015
Jan 15, 2014
Jan 7, 2013
Jan 12, 2012
Jan 13, 2011
Jan 12, 2010
Jan 15, 2009
Jan 6, 2008