Rokjesdag

[1] The term had been used before it was popularized by Dutch writer and columnist Martin Bril, to whom its coinage is occasionally mistakenly attributed.

[4] Bril's fascination was with the phenomenon that he sensed of women, as if by secret agreement, suddenly appearing outside with bare legs and a skirt.

An earlier reference to this phenomenon in the springtime is seen in François Truffaut's 1977 film L'Homme qui aimait les femmes.

In 2016 there was a Dutch film with the title Rokjesdag, directed by Johan Nijenhuis.

[7] In the United States "national skirt day" for men is held on March 10.