Deployments/Yearly calendar

Below is an extended forecast for the days on which deployment slots on the calendar won't be made and weeks in which the deployment train will not run.

Calendar

This is a naïve estimate based on the idea that any WMF holiday that does not fall on a Monday or a Friday makes the week a non-train week.

Deployment disruptions 2021

What	When	Deployment decision	What happened?
Martin Luther King Day	Mon 18 Jan	No deploys	No MW deploys
Presidents' Day	Mon 15 Feb	No deploys	One MW deploy
WMF Holiday	Mon 29 Mar	No deploys	One MW deploy, one MW train group deploy
WMF Holiday	Fri 9 Apr	No deploys	No MW deploys
WMF Holiday	Mon 12 Apr	No deploys	Sixteen MW deploys
Earth Day	Thu 22 Apr	No Train (1.37.0-wmf.2), and no deploys that day	No MW deploys
WMF Holiday	Fri 28 May	No deploys (not that there are ever deploys on Friday)	One MW deploy
Memorial Day	Mon 31 May	No deploys	No MW deploys
Engineering Productivity Team Offsite	Mon 31 May–Fri 4 Jun	No Train (1.37.0-wmf.8), but deploys OK	—
WMF All-Hands	Tue 15–Thu 17 Jun	No Train or deploys all week (1.37.0-wmf.10)	One MW deploy
Juneteenth	Fri 18 Jun	No deploys (not that there are ever deploys on Friday)	No MW deploys
Fourth of July + following WMF holiday	Mon 5–Fri 9 Jul	No Train or deploys all week (1.37.0-wmf.13)	Many deploys
International Day of the World’s Indigenous Peoples	Mon 9 Aug	No deploys
Labor Day	Mon 6 Sep	No deploys
Engineering Productivity Offsite	TBD End of Oct/Early Nov	No Train (¿which?), but deploys OK
Indigenous Peoples' Day	Mon Oct 11	No deploys
Election Day	Tue 2 Nov	EU Train week
Veterans' Day	Thu 11 Nov	No Train (1.38.0-wmf.8), and no deploys that day
Thanksgiving Day	Thu 25 & Fri 26 Nov	No Train (1.38.0-wmf.10), and no deploys those days
End of Year Holiday	Mon 27–Fri 31 Dec	No Train or deploys all week (1.38.0-wmf.15)