"After the first hour is early."

Translation: Post primam horam mane est.

[RtLKv6dm]

Why don't they accept???
Post horam primam mane est.

[Pedro177810]

I have found this, in another thread of discussion:

“…in Gildersleeve's Latin Grammar, and happened upon this note (section 676): "Ordinals regularly follow, Cardinals regularly precede the substantive".

That is: hora prima ( ~ post horam primam ) vs. quattuor puellae, for example.
Both hora prima and prima hora are possible, though (Latin varies a lot between classical, late-classical and ecclesiastical authors). For some reason, Duolingo seems to favour the 2st solution. See

https://forum.duolingo.com/comment/34433541

[water_color]

Does "mane" mean "early" only in absolute sense (i.e. close to the beginning of the day), or it can be also used in a relative sense (early for something, e.g. it's too early to harvest, wait one more week)?

[DavidMcDovvel]

Only within the context of a day.

[STRADS1551]

Does this mean "IT IS early after the first hour"?

[Marymary789]

'Horam primam' is correct

[Szfia4]

Horam primam should be accepted

[Pedro177810]

I agree. You should report it.

[zU60uNOa]

It’s early after the first hour ‘cause it’s before the second one