Quick little translation I did of a fan-manga page from artist Morinokinoko on twitter.
There is a pun in Japanese that the date July 8th can be pronounced as "Nappa". This is an unofficial/small joke day in Japan and China for "eating green vegetables" since the Kanji for those characters can be read as "Green Leafy Vegetables" specifically cabbage.
So in 2020 a Twitter meme and hashtag were spawned for July 8th, based on Dragon Ball, saying that it's "Nappa" day, since his name as well means "Cabbage". So lots of twitter artists draw him or make fan comics on July 8th.
You now have some useless knowledge.