De or het vetersluiting?

The correct Dutch article is:

de vetersluiting

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

How to use vetersluiting

the vetersluitingde vetersluiting
this vetersluitingdeze vetersluiting
that vetersluitingdie vetersluiting
our vetersluitingonze vetersluiting
your vetersluitingjouw vetersluiting
every vetersluitingelke vetersluiting
which vetersluiting?welke vetersluiting?
a big vetersluiting / the big vetersluitingeen grote vetersluiting, de grote vetersluiting