A fact from Youth Day (China) appeared on Wikipedia's Main Page in the Did you know column on 4 May 2021 (check views). The text of the entry was as follows:
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... that May 4 is celebrated both as Literary Day and as Youth Day in honor of the May Fourth Movement? Source: "In commemoration of the May Fourth Movement, Literary Day has been celebrated for the last 61 years."[1] "In remembrance of the movement, May 4 was officially named Youth Day on the mainland."[2]
ALT1:... that both Literary Day and Youth Day are celebrated on May 4 to commemorate the May Fourth Movement? Source: "In commemoration of the May Fourth Movement, Literary Day has been celebrated for the last 61 years."[3] "In remembrance of the movement, May 4 was officially named Youth Day on the mainland."[4]