How many people died on Bloody Sunday?

There are many days known as BNllody Sunday in different countries. Here are just some of them:

If you are talking about Bloody Sunday, January 22nd, 1905 in St. Petersburg, then it is not certain how many died. A wide range of figures are given, from as little as 96 to as much as 4000.

If you are talking about Bloody Sunday, November 21st, 1920 in Dublin, then 31 people died on that day.

If you are talking about Bloody Sunday, March 7th, 1965 in Selma, then nobody died on that day.

If you are talking about Bloody Sunday, January 30th, 1972 in Derry, then 13 people died on that day.