New Zealand has banned all advertising on TV on Christmas, Easter, and Good Friday!

When television and thus television advertising first arrived in New Zealand in the 1960s, television transmitted four nights a week and only two nights had advertising. Later, it rose to four days a week of advertising with a maximum of six minutes of advertising an hour.

When a second channel came about in 1975, there were five days of television and advertising a week with nine minutes an hour given to advertising. But, all this changed with the Broadcasting Act of 1989 which stated that there could be no advertising from 6 a.m to noon on Sundays and Anzac Day, or at any time on Christmas Day, Good Friday, and Easter Sunday. Advertisements can now be given 14 minutes for every broadcast hour.

(Source)