checkout time without an article?

English as a Second Language English Vocabulary, Grammar and Idioms
1

Hi, I have a question on the sentence below

Your website says checkout time is 11a.m.

It’s a sentence from an enquiry to a hotel. Is the sentence okay? Doesn’t it need “the” before checkout?
Thanks in advance,

sweetpumpkin

2

For me it is acceptable without the article. There should be a space in “11 a.m.”.