Deployments/Yearly calendar/2025
See also Deployment calendar 2024 and Deployment calendar 2026.
| What | When | Deployment decision | What happened? |
|---|---|---|---|
| New Year's Day | Wed 1 Jan | No deploys | ✅ No MW deploys |
| Martin Luther King Jr Day | Mon 20 Jan | No UTC Late backport window | ❌ 2×MW deploys |
| U.S. Presidents' Day | Mon 17 Feb | No UTC Late backport window | ❌ 3×MW deploys |
| Northward Switchover: Services + Traffic | Tue 18 Mar | Deployments locked during switch | ✅ happened |
| Northward Switchover: Mediawiki | Wed 19 Mar | Deployments locked during switch | ✅ happened |
| Earth Day | Tue 22 Apr | No deploys on 22 Apr
No train (wmf.26), week of 21 Apr |
✅ No MW deploys |
| U.S. Memorial Day | Mon 26 May | No UTC Late backport window | ✅ No MW deploys |
| Juneteenth | Thu 19 Jun | No UTC Late backport window | ✅ No MW deploys |
| U.S. July Holiday | Thu 3 Jul | No UTC Late backport window | ✅ No MW deploys |
| Fourth of July | Fri 4 Jul | No deploys as normal | ✅ No MW deploys |
| International Day of the World’s Indigenous Peoples | Fri 8 Aug | No deploys as normal | ✅ No MW deploys |
| U.S. Labor Day | Mon 1 Sep | No UTC Late backport window | ✅ No UTC late MW deploys |
| Southward Switchover: Services + Traffic | Tue 23 Sep | Deployments locked during switch | ✅ happened |
| Southward Switchover: Mediawiki | Wed 24 Sep | Deployments locked during switch | ✅ happened |
| Columbus Day (also Indigenous Peoples' Day) | Mon 13 Oct | No UTC Late backport window | ✅ No UTC late MW deploys |
| Veterans' Day | Tue 11 Nov | No UTC Late backport window | ✅ No UTC late MW deploys |
| US Thanksgiving | Thu 27 Nov | No UTC Late backport window | ✅ No UTC late MW deploys |
| Day-after-Thanksgiving | Fri 28 Nov | No deploys as normal | ✅ No MW deploys |
| Release Engineering off-site | Mon 8–Fri 12 Dec | No train (wmf.6); deploys as normal | |
| End of Year Holiday | Wed 24–Wed 31 Dec | No trains (wmf.8–9) or deploys |