Thread:Dates for milestones (1)

As a rule of thumb, I suggest we use the dates that things became real, not the day the idea was agreed to or the press release announced an intention. I've tried to find dates of deliverables, such as the first month something was offered, or became policy, or launched on the web with a working site.

There are exceptions, such as the Obama announcement (which was followed by a Bill that is still not real).

Other ideas or suggestions for how to decide on dates?