January 17
Pollard willow pruning day by WGNL
January 17
New Year’s drinks
February 17
Kick-off 2026
March 3
First school visit of 2026
April 1 – 12:00
Opening of the 2026 windmill season for regular visitors
April 11
Heritage Day Leidschendam-Voorburg
May 9
National Windmill Day
May 30
Essesteijn Polder Spring Festival
July 4
Leidschendam-Voorburg Windmill Day
July 18 to Aug. 30
Summer promotion: visit the windmills of Leidschendam-Voorburg
September 12
Open Monument Day
October 28
Last opening day of the 2026 season for regular visitors
November 26
Last school visit of 2026
December 9
The Christmas star is hung in the windmill
December 16
The nativity scene is placed for the window installed