Birthday Calculators
http://searchforancestors.com/utility/birthday.html
http://www.censusdiggins.com/birthdate_calculator.html
http://www.obitcentral.com/calc.htm
http://www.timeanddate.com/date/duration.html
http://www.hackerscreek.com/formula.htm
http://www.progenealogists.com/birthfromdeath.htm
ftp://ftp.rootsweb.com/pub/roots-l/genealog/genealog.perpcal
http://www.ayrshireroots.com/Genealogy/Reference/Day%20Born%20z.htm
http://www.cyndislist.com/calendar.htm
http://javascript.internet.com/calculators/age-calculator.html
http://toshop.com/censuscalc.cfm
http://www.bakery.co.uk/datecalc.html
http://www.angelfire.com/va/ValsGenealogyPage/Calculator.html