Bingo. This is the exact reason I wanted this function.

<3 Grep.

For manually browsing, the "Session Time" thing is fine, however, when grepping, it's nice to be able to tell when something happend, without having to dig through the file and scroll upwards to find the actual date. Or without having to use the -U/B/A functions in grep.

I could also choose to create a new log file per day, but this seems more of an annoyance to me.