De or het kermisperiode?

The correct Dutch article is:

de kermisperiode

Rule Words ending in -ode: always de. See the rule

How to use kermisperiode

the kermisperiodede kermisperiode
this kermisperiodedeze kermisperiode
that kermisperiodedie kermisperiode
our kermisperiodeonze kermisperiode
your kermisperiodejouw kermisperiode
every kermisperiodeelke kermisperiode
which kermisperiode?welke kermisperiode?
a big kermisperiode / the big kermisperiodeeen grote kermisperiode, de grote kermisperiode