They tend to display it for blocked connections like vpns
That's a tad frustrating,.since Imgur is now blocking all UK traffic. VPN is my main saviour these days for sites that don't also block the main VPN providers or data center IPs
Looks like a regression line between April 1 and May 1. The line moves around between the 11th and the 16th from the year ~850 until ~1950, but never crosses it until ~1950. The current average is about 6 days earlier (April 5th).