Example: The fear of anyone born in 7200 (future) would be Heptimilliduocentigenianophobia.
Tetramilli=4000+
Pentimilli=5000+
Heximilli=6000+
Heptimilli=7000+
Octomilli=8000+
Novamilli=9000+
Decimilli=10000+
Centi-class
No centi=000+
Centi=100+
Duocenti=200+
Tricenti=300+
Tetricenti=400+
Penticenti=500+
Hexicenti=600+
Hepticenti=700+
Octocenti=800+
Novacenti=900+
Deci-class
No deci=00+
Deci=10+
Duodeci=20+
Trideci=30+
Tetrideci=40+
Pentideci=50+
Hexideci=60+
Heptideci=70+
Octodeci=80+
Novadeci=90+
Base-class
Note: The fear of the year 0 is not Genianophobia, but Origigenianophobia.
No base unit=0+
Uni=1+
Duo=2+
Tri=3+
Tetri=4+
Penti=5+
Hexi=6+
Hepti=7+
Octo=8+
Nova=9+
BCE/CE or BC/AD
Most BY phobias are afraid of ones after the zero year. There is a way to adress BCs and BCEs too.
Just add -primo- right before -genianophobia.
Advanced
Future year 36000 is addressed Trideciheximilligenianophobia.
Future year 192541 is addressed Centinovadeciduomillipenticentitetrideciunigenianophobia.
Just stack the first 3 digits of a six-digit number before milli- and then the rest before -genianophobia.
Megi=n*1000000+
Gigi=n*1000000000+
Teri=n*1000000000000+
Peti=n*1000000000000000+
Exi=n*1000000000000000000+
Zetti=n*1000000000000000000000+
Yotti=n*1000000000000000000000000+
n is the three digits of their respective -illions, like hundred trillion ten trillion, and one trillionths places.
Future year 563897457 is addressed Penticentihexidecitrimegioctocentinovadeciheptimillitetracentipentideciheptigenianophobia.
Birthmonth
januara=January
februara=February
maracha=March
aprilla=April
maiso=May
june=June
jule=July
augusti=August
septembera=September
octobera=October
novembera=November
decembera=December
Day of Month
Go with how birthyears are organised, like the fear of Feb 20, 2006 is Februaraduodeciperostrofidimillihexigenianophobia.
Add the month first. Next, add the day number and then -perostrofi-. If you want to add the birthyear, than plug the described word above behind the birthyear's phobia.