@ippiki_ookami: it's taken out on purpose, because we have users and artists who know the specific time when the day changes on site to snipe spot on spotlight with their uploads. Also popular was full of only handful of vanilla stuff, solo females with visible bits with exact cutoff, so it was only useful for those who are into that vanilla stuff and females.
It's replaced with "hot" aka order:rank which instead of using exact day seperation uses posts age instead and can be used in combination of other tags. Also we now have age: metatag on top of date:.

GodJar said:
You are not blind or it could be some setting neither you nor I have enabled.

There is a setting in advanced to colorize usernames according to rank. I haven't tried it yet, but it seems like a better idea than actually writing out their rank as text.