De or het during?

The correct Dutch article is:

de during

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

How to use during

the duringde during
this duringdeze during
that duringdie during
our duringonze during
your duringjouw during
every duringelke during
which during?welke during?
a big during / the big duringeen grote during, de grote during

Dutch words ending in during

voortduring

In compound words, the last part decides the article. See the rule