According to the Fedora 30 schedule[1], the 100% code complete deadline[2] for Changes is Tuesday, 5 March. The beta freeze[3] takes effect on this date as well. All Changes should be in "ON_QA" state by then.

[1] https://fedoraproject.org/wiki/Releases/30/Schedule [2] https://fedoraproject.org/wiki/Changes/Policy#Change_Checkpoint:_100.25_code... [3] https://fedoraproject.org/wiki/Milestone_freezes