Globe theatre opened (probably) (12-6-1599)

Shakespeare's theatre.
"Research...suggested that the choice of day would have been influenced by several factors, notably the date of the summer solstice that year (12 June in the Julian calendar)."
In any case, that date was chosen for the opening in 1997 of the replica Globe which stands, not too far from the original site, on the south bank of the Thames (in Southwark, also the location of the Tabard inn from which Chaucer's pilgrims set off).
https://en.wikipedia.org/wiki/Globe_Theatre
Crystal spends some time on the "Original Pronunciation" performances of Romeo and Juliet at the Globe in 2004. He was the main linguistic consultant on the reconstruction of a text with phonetics circa 1600.
You can read a lot about it here, with a picture of guess-who:
https://www.originalpronunciation.com/GBR/Home