Update Breaking Changes timeline

I've been working from one timeline while the docs said something different.

docs/breaking_changes.md

@@ -17,8 +17,8 @@ The next Breaking Change is scheduled for February 29, 2020.
 * [x] 2019 Sep 21 - `future` is created. It will be rebased weekly.
 * [x] 2020 Feb 1 - `future` closed to new PR's.
 * [x] 2020 Feb 1 - Call for testers.
-* [ ] 2020 Feb 26 - `master` is locked, no PR's merged.
-* [ ] 2020 Feb 28 - Merge `future` to `master`.
+* [ ] 2020 Feb 27 - `master` is locked, no PR's merged.
+* [ ] 2020 Feb 29 - Merge `future` to `master`.
 * [ ] 2020 Feb 29 - `master` is unlocked. PR's can be merged again.
 
 ## What changes will be included?