First printed catalogue of library holdings published (24-5-1595)

"Nomenclator autorum omnium, quorum libri vel manuscripti, vel typis expressi exstant in Bibliotheca Academiae Lugduno-Batavae" (list of all the authors whose books, whether manuscript or printed, are available in Leiden University Library).
"A contemporary print shows large folio volumes laid our on twenty-two shelves, and grouped into themes: theology, literature, philosophy, mathematics, history, medicine and law. Each book was chained to a rod above a slanting shelf, so that readers were able to tilt them out, consult them, but not remove them."
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It's also the birthday of Queen Victoria (24-5-1819), a public holiday in Canada, officially "Victoria Day", but when I was young it was "Queen's Birthday", and considered the "official" birthday of the reigning monarch.
https://en.wikipedia.org/wiki/Victoria_Day
New Zealand has a similar fictitious "King's/Queen's Birthday" public holiday, which is not far off -- first Monday in June.
https://en.wikipedia.org/wiki/King%27s_Official_Birthday