きょう の パーティー は いつなんですか。
Is placing "itsunandesuka" correct when I'm trying to make a sentence which means "When is today's party" while using the grammar pattern "ndesuka"?
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Sign up to join this communityThe position of いつ is correct and there's nothing wrong with your sentence, but it's better to use 何時{なんじ} to ask for when in this case.
今日{きょう}のパーティーは何時{なんじ}なんですか。
The nuance of using なん is that the topic of the party has already being introduced as opposed to
今日{きょう}のパーティーは何時{なんじ}ですか。
Some people could also argue that the first sentence is slightly more friendly.
The word いつ is appropriate for any kind of situation and doesn't change depending on who is speaking or who you are speaking to.