Sct. John's Eve - Sct. Hans Eve

It is time to dream...it is midsummer!
The evening of June 23 is St John's Eve, also called Bonfire
Night. Sct. John's Eve is the eve of celebration before the
Feast Day of St John the Baptist...in Denmark this night is
called Sct. Hans aften (Sct Hans Eve). In many places
midsummer was celebrated tonight with a lot of singing,
dancing and fun...read the description from Denmark
below and here....and Ireland here

Yorkshire Midsummer Eve Custom by E. Kaufmann
link