I think the end date of our 3 series is going to be 2018-12-01.

The problem is that defines the "support" date as the day of the last scheduled release, unlike the convention followed by every other project on this list, and it will leave a gap between them, rather than being supported at least until the release of the following version (i.e. leaving no version of Spyder "supported" during the transition period). Even if the last scheduled release is on that date, we would naturally support Spyder 3 (e.g. via Github, Gitter, Google Groups, Docs, and possibly emergency fixes if necessary)at least until the release of Spyder 4. It wouldn't make any sense to do otherwise.

Therefore, I propose an end date of at least 2019-01-15, the same day on which Spyder 4 is scheduled for release (although at least in practice, we'd want to consider the delay to getconda packages out, possible emergency fixes, at least some latency in all users upgrading to a new major version on the day of its release, etc.).

This should bestart: 2019-01-15,end: 2019-12-15

Following the above reasoning, we would want to shift the end date to at least the start date of the next version, 2019-12-31.

This one is good!

👍