Where can I find info on Name day? I have been told that each Finnish person has a Birthday and a Name day

The best way to find out about Finnish name days is to buy yourself a calendar or an almanac that has a list of Finnish male and female names. The Finnish almanac has 361 Finnish female names and 354 Finnish male names; the Swedish almanac version has 263 female names and 264 male names. Most names the Finnish use can be found on the almanac, but some new ones cannot be found on almanacs, these names do not have an official name day at all. You will find calendars and almanacs e.g. in bookshops. If you want to learn more about Finnish names, you might take a look at http://www.eponym.org/hq.html There are many Finnish name links and also a pronunciation guide. A fairly good web page is also http://www.genealogia.fi/nimet/nimi36qs.htm

There are also some good books on the subject, but unfortunately these exist only in Finnish:
Kiviniemi, Eero. 1982. Rakkaan lapsen monet nimet. Suomalaisten etunimet ja nimenvalinta.
Vilkuna, Kustaa. 1976. Etunimet.