We were an hour late for Mass last year, because I wasn't aware that "today's the day" to spring forward. No one reminded me about the time change. I got on CathInfo when I got home and ranted about it :)
A year previous, it also took me COMPLETELY by surprise, but at least I caught it right before bed.
You'd think it would be impossible to miss, but it happened to me large as life. I read CNN and other news sites, but unfortunately I'm home a lot, even for work. I have no co-workers.