Our "agile" process uses one-month long sprints, ending on the last day of the month with a demo. (I'll rant some other time about non-consistent iteration lengths.)

Our sprint ends today (Monday). What was the most logical time to introduce changes that affect the architecture and break every single build? How about 4PM last Friday?

We're still waiting on the build breaker to show up while trying to figure out what the heck we can cobble together and run to show that we actually did something in the last month.