Doesn't Anyone Check Time Zones Anymore?

Another statutory holiday here today, and (as usual) the first telephone call came in around 07:00. Didn't the etiquette used to be 10:00 on holidays, or even 08:00? Sure it was 10:00 or so on the east coast, but don't they check time zones before phoning? Luckily I'm not a late sleeper, but that's my prime meditation time. I really must remember to keep the ringer shut off for holiday mornings. OK, grumbling finished - Back to enjoyment!