I found a copy of New Brunswick's Time Definition Act consolidated to 2005-07-15 <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> and it confirms that New Brunswick switches to and from DST at 00:01 rather than 02:00. So we need a new Zone. I am thinking of using the name America/Moncton. Moncton has approximately the same population as Saint John, but the latter name is uncomfortably close to the already-existing Zone America/St_Johns. Page 2 of the above reference says "1965, c.7, s.1; 1973, c.74, s.75; 1993, c.9, s.1; 2005, c.7, s.83." I assume this refers to dates when the law changed, which would be useful for tracking down the history of America/Moncton. I did track down an older version of the consolidated document <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> which makes it clear that they haven't changed the rules since 1993 at least, but I can't go earlier than that in the canlii.org database. For dates before 1993 I'll probably defer to Shanks, unless someone else can track it down.