Normal English speaking:

“School’s over at 1pm.”

A more colloquial use, but equally as understandable and correct in spoken usage:

“School’s done at 1pm.”

The construction you give,

“The school ends at 1pm,”

would apply to something specific, like if a special set of courses was being offered by a particular department.

Inserting the article “the” before “school” changes the meaning significantly. “The school ends at 1pm,” would mean something like “The journalism school ends at 1pm,” or “The nursery school ends at 1pm.” (…”the grade school ends at 2:20, and the high school ends at 3pm,” as an example of using the “the”)

“The school ends at 1pm”

is NOT complementary to

“School begins at 8am.”

NOT!

School begins at 8am.

School ends at 1pm.

That’s good, and acceptable. The statements are structurally equal.

“School ends at 1pm,” is a more formal way of speaking the idea that school is over at 1pm. It works better in *written* form, or if you are making a formal spoken announcement.

Also, if you’re doing translation for a business letter about a school’s schedule, definitely go with that pair.

However, if you’re talking, it would be more normal sounding in a casual conversation with friends or colleagues to say “School starts at 8,” or “Classes start at 8,” and then “[It’s] over at 1,” (or “[School’s] over at 1) “… done at 1,”

…if it’s *your* school/classes that are over, whether you are teaching or a student: “We finish up at 1” is also a typical statement.

Best wishes with your English!

Nothing to do with the sentence, but grammatically is wrong the way you have it. this is correct. ends is fine.

EDIT=where would the school be going?, if it departs at 1 pm?, departs is not correct.

You can use , The school lets out at 1 pm.

Saying “class begins” or ends at whatever time would be more specific to what you mean.

but it will be nice if it is “”the school departs at 1:00″”