Seems you are not finished:
1 Jahre 3 Monate 11 Tage
same like
1 years 2 months 11 days
should be
1 year 2 months 11 days
1 Jahr 3 Monate 11 Tage
---------------------- funny funny! -------------------------
and while we write numbers from 1 to 12 as one to twelve ...
or all numbers with less than four syllables as words ...
Ein Jahr, drei Monate und elf Tage
Ein Jahr, drei Monate und zweiundzwanzig Tage