Wikipedia:Selected anniversaries/May 31
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This is a list of selected May 31 anniversaries that appears on the "On this day" section of the Main Page. To suggest a new item, in most cases you can be bold and edit this page. Please read the selected anniversaries guidelines before making your edit. However, if your addition might be controversial, or on a day that is or soon will be on the Main Page, please post your suggestion on the talk page instead.
Please note that the events listed on the Main Page are chosen based more on relative article quality and to maintain a mix of topics, not based solely on how important or significant their subjects are. Only 5–6 events are posted at a time and thus not everything that is "most important and significant" can be listed. In addition, an event is not generally posted this year if it is also the subject of the scheduled May 31, 2019 featured article or the May 31, 2019 featured picture.
To report an error when this appears on the Main Page, see Main Page errors. Please remember that this list defers to the supporting articles, so it is best to achieve consensus and make any necessary changes there first.
Template:*mp 1223 – Mongol invasions: Mongol forces defeated a combined army of Kiev, Galich, and the Cumans at the Kalchik River in present-day Ukraine. Template:*mp 1669 – Citing poor eyesight, English naval administrator and Member of Parliament Samuel Pepys (pictured) recorded his last entry in his diary, one of the most important primary sources for the English Restoration period. Template:*mp 1935 – A 7.7 Mw earthquake struck Balochistan in the British Raj, now part of Pakistan, killing anywhere between 30,000 and 60,000 people. Template:*mp 1981 – An organized mob of police and government-sponsored paramilitias began burning the public library in Jaffna, Sri Lanka, destroying over 97,000 items in one of the most violent examples of ethnic biblioclasm of the 20th century. Template:*mp 2009 – American physician George Tiller, who was nationally known for being one of the few doctors in the United States to perform late-term abortions, was shot and killed by Scott Roeder, an anti-abortion activist.