Questions & Answers about Septima hora iam est.
Because septima means seventh, while septem means seven.
Latin uses the ordinal number here, because the sentence is talking about a numbered hour: the seventh hour. So:
- septem = seven
- septima = seventh
In English, we also say the seventh hour, not the seven hour.
Because it agrees with hora, and hora is a feminine noun.
In Latin, adjectives must agree with the nouns they describe in:
- gender
- number
- case
So since hora is feminine singular, septima also has to be feminine singular.