I used to work with her so it might just work. ?
You should have told her beforehand
So, the provinces visited from 2014 to 2020 on King's Day will be:
2014: Noord-Holland - Amstelveen (& De Rijp) (planned for 2013 but cancelled because of abdication/inauguration) [2013 - abdication & inauguration; 1997 - visit]
2015: Zuid-Holland - Dordrecht [2005]
2016: Overijssel - Zwolle [2003]
2017: Noord-Brabant - Tilburg [2007]
2018: Groningen - Groningen [2004]
2019: Utrecht - Amersfoort [2012]
2020: Limburg - Maastricht [2011]
Provinces still to be visited (year is of their last Queen's day visit by Beatrix):
Zeeland (Southwest) [2010]
Gelderland (East) [2009]
Flevoland (Center) [2006]
Drenthe (Northeast) [2002]
Friesland (North) [2008]
So, in 2021 it's about time they visit Drenthe (out of queen Beatrix' queen's 31 day visits only 1 1/2 went to Drenthe! (in 1981, 1982 and 1996 the queen combined 2 provinces). The provincial capital of Assen hasn't had a queen's day visit, so would be the most likely location. Emmen (largest municipality in Drenthe) could be a good alternative - including some 'zoo'-themed activities.