あいにくその日は予定があります

N3 あいにく ainiku unfortunately, unluckily N5 その sono that, that one near listener N4 日 hi day, sun, sunlight N4 予定 yotei plan, schedule, arrangement N5 あります arimasu there is / exist

N5 日 nichi, jitsu / hi, -bi, -ka day, sun, Japan N3 予 yo, sha / arakaji.me beforehand, previous, myself N3 定 tei, jou / sada.meru, sada.maru, sada.ka determine, fix, establish

N5 〜ます masu Used at the end of verbs, polite present or future form, makes the sentence more polite N5 〜予定 yotei Indicates scheduled future plan decided beforehand, equivalent to be scheduled to do N5 〜が ga Marks the grammatical subject, highlights new information, can also show slight contrast in some sentences N5 〜に ni Indicates destination, target, arrival point, specific time, or person receiving an action N5 〜の no Indicates possession, relation between nouns, nominal explanation, or turns a verb into a noun phrase N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information