25 March

Independance Day- Greece [1821] I would suppose all the Kings would have celebrated [?]

and- Birthday [1921] of Alexandra, Princess of Greece, wife of Peter II King of Yugoslavia [recent discussion]

also birthdays of-1915 Georg Wilhelm Ernst Prince of Hannover [married to Sofia of Greece]

1739 Edward Augustus, Duke of York

1133 Henry II King of England

1853 Muzzafir Shah [Qajar] of Persia

1306 Robert the Bruce becomes King of Scotland.

1821 Greece declares its independence from the Ottoman Empire, beginning the Greek War of Independence.

1941 Kingdom of Yugoslavia joins the Axis powers.

1975 Faisal of Saudi Arabia is shot and killed by a mentally ill nephew.

1633 Birth and death of Vasili Mikhailovich, Grand Duke of Russia

1633 Birth and death of Vasili Mikhailovich, Grand Duke of Russia

Wrong. Not 25th, not March, not 1633. Where you found such strange info? In June 1633 Tsarevich John was born...

And why do you call Tsarevichs and Tsarevnas as Grand Dukes and Grand Duchesses?

There were more than one person with that name.

Here we tend to use Grand Duke/Duchess instead.