Dutch 'van' is never capitalised.
Flemish (Belgian) 'Van' is always capitalised.
"The "v" is written in lower case, except when the surname is used as standalone (when the first name or initials are omitted), in which case it is capitalised, as in "de schilder Van Gogh" ("the painter Van Gogh").[2] In Dutch, compound terms like "de Van Goghtentoonstelling" ("the Van Gogh exhibition") the "v" is capitalised, unless the connection between the person and the concept is or has become very weak."
Every day is a school day.