I do like Objectpark’s free FuzzyClock menu bar app. Rather than telling you the exact time in hours and minutes, it tells you it in plain English*, like “nearly six”, or “five past seven”. Which is a much more relaxed way of going through the day.
If you really must know the exact time, you can always hover over the clock, or click it.
You can also set up your own “special” times. For example I like to set it to say “beer o’clock” between 6 and 6:30 pm. Which is round about now, as it happens.
(*Or, if you prefer, practically any other commonly-spoken language – including Elmer Fudd, Hacker-speak and Jive.)