De or het memodatum?

The correct Dutch article is:

het memodatum

Rule Words ending in -um and -ium: usually het. See the rule

This word is not in the word lists we use to double-check answers.

How to use memodatum

the memodatumhet memodatum
this memodatumdit memodatum
that memodatumdat memodatum
our memodatumons memodatum
your memodatumjouw memodatum
every memodatumelk memodatum
which memodatum?welk memodatum?
a big memodatum / the big memodatumeen groot memodatum, het grote memodatum