Dear Mariethe,
"A Comprehensive Grammar of the English Language", R. Quirk, et al, page 277, shows:
"During (the) break/recess". (The authors contend that the word "the" is an optional part of the phrase, and can be used, or not used, as the Speaker chooses).
"Thank you, students. The Break is over."
"Thank you, students. Break is over."
"Thank you, students. The Recess is over."
"Thank you, students. Recess is over."
According to the authors, it seems that these types of phrases are both acceptable.
Thank you, Mariethe, for bringing this to my attention.
Les