As usual on Saturdays and Sundays, Veiling Rhein-Maas will not be auctioning on King's Day (Saturday 26 April and Sunday 27 April). Veiling Rhein-Maas will not be auctioning on Labour Day (Thursday 1 May) this year.
The supply and opening hours for King's Day and Labour Day can be found here.
All special auction days can be found here (German).