to elaborate... Facebook uses "how long ago," instead of an actual time. I don't like it there, either. It's not that big of a deal for me to know what time it is. My PC has a clock, my phone that sits next to the PC has a clock, and my work PC has a clock. I have my board settings here reflecting my timezone.
It's really not that hard for me to know how recent a posting was, and I totally prefer to see hard data (I guess "3 minutes ago" is, technically, hard data, but it feels subjective to me).
Just my 2 cents. Feel free to ignore it.