"Lunch starts at twelve."

Translation: Prânzul începe la doisprezece.

[Lachlan_Hunt]

Why is douăsprezece not accepted?

[lpaulger]

"pranzul incepe la ora douasprezece" isn't incorrect is it?

[KevinSmith777042]

Surely ora is either male or female - or how would one choose when to use which?