Questions & Answers about Wir haben das Treffen und die Party.
Does the verb haben affect the words das Treffen and die Party?
Yes, haben (to have) always requires the accusative case for the things being "had" (the direct objects). However, only masculine articles change in the accusative (from der to den). Since das Treffen is neuter and die Party is feminine, their articles look exactly the same as they do in the subject (nominative) case.
How would this sentence look if I used possessive words like "my" and "your" instead of "the"?
If you wanted to say "my meeting and your party", you would say mein Treffen und deine Party. Just like the words das and die don't change in the accusative case, the possessive words for neuter (mein) and feminine (deine) also don't change their endings here. You only have to add an -en ending (like meinen or deinen) for masculine nouns!
Treffen is the verb for "to meet". How does it work as a noun here?
In German, you can easily turn a verb into a noun by capitalizing its infinitive form (the standard dictionary form ending in -en). When you do this, the new noun is always a neuter word, which is why it uses the article das (das Treffen).
I noticed Party is an English word. Do borrowed words still get a gender in German?