User blog comment:Nagi0e/Question with Expected Answer: Why was April Fools 2018 not celebrated on Roblox?/@comment-26397550-20180402162747

It's fully up to Roblox whether they want to "celebrate" or not. I don't recall any law stating that everyone's to participate. It's mindless and kind of a waste of resources- it could be put to doing something of use. Which is likely what was done.