https://release.debian.org/testing/freeze_policy.html

Freeze dates from email to debian-devel-announce:

• 2025-03-15 - Milestone 1 - Transition and toolchain freeze
• 2025-04-15 - Milestone 2 - Soft Freeze
• 2025-05-15 - Milestone 3 - Hard Freeze - for key packages and packages without autopkgtests
• To be announced - Milestone 4 - Full Freeze