There are at least two Anglosphere anniversaries today: in America today is Patriot's Day, which commemorates the Battle of Lexington and Concord. In Ireland, it's the 90th anniversary of the Easter Rising in Dublin.
I just posted the Concord Hymn for Patriot's Day; here's "A Row in the Town" for the Easter Rising:
I'll sing you a song of a row in the town, When the green flag went up and the Crown rag came down, 'Twas the neatest and sweetest thing ever you saw, When they played that sweet game they call Erin Go Bragh. One of our comrades was down at Ringsend, For the honor of Ireland to hold and defend, He had no veteran soldiers but volunteers raw, Playing sweet Mauser music for Erin Go Bragh. Now here's to Pat Pearse and his comrades who died Tom Clarke, MacDonagh, MacDiarmada, MacBride, And here's to James Connolly who gave one hurrah, And placed the machine guns for Erin Go Bragh. One brave foreign captain was raving that day, Saying, "Give me one hour and I'll blow you away," But a big Mauser bullet got stuck in his jaw, And he died of lead poison for Erin Go Bragh. Old Ceannt and his comrades like lions at bay, From the South Dublin Union poured death and dismay, And what was their horror when the invader men saw All the dead khaki soldiers in Erin Go Bragh. Now here's to old Dublin, and to her renown, In the long generations her fame will go down, And our children will tell how their forefathers saw, The red blaze of freedom of Erin Go Braugh.