A fact from Katowice massacre appeared on Wikipedia's Main Page in the Did you know column on 30 November 2019 (check views). The text of the entry was as follows:
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I think “Katowice massacre” is probably the most descriptive. “Katowice massacre (1939)” would be a more descriptive title; I don’t know if it’s in the MoS, but years are generally only added when there is ambiguity.
I’ve added this article to Bloody Monday (disambiguation). Since the Częstochowa massacre began on the same Monday, I think it’s best to use the place names alone in the article title and list “Bloody Monday” as an alternative name.
I think the statement “one of the largest war crimes of the Wehrmacht during its invasion of Poland” needs to be qualified, perhaps as “one of the earliest large-scale war crimes of the Wehrmacht during its invasion of Poland in September and early October 1939”. It’s not to reduce the significance of this event, but to emphasize that events like this happened in many other places. For English Wikipedia, the difference between the invasion of Poland and the occupation should be stressed, because of even more serious events such as the Intelligenzaktion which occurred during the occupation period rather than the invasion. Most readers will know when the invasion began, but will not necessarily know when it ended and when the occupation began. Roches (talk) 22:07, 30 November 2019 (UTC)[reply]