Some peoples (like me) are too stupid to calculate timezone offsets properly. So when email arrives at time you are sleeping and sender of email live on the other side of the earth, it is not so easy to find what is a current time on the other end.
To help, this patch on kdepim was created. It display current time on message sender`s end in the header part of the message.
I`m very unsure it would be useful for someone except me, so it is not filled as a wish on bugs.kde.org.
Background images and colors are subject to change if someone will suggest better variant :-)