Since 2011, Drupal core has had a scheduled monthly bugfix release window, and since 2012, this window has specifically been on the first Wednesday of the month. We are considering extending this window so that a bugfix release is scheduled to come out during a specific week, but not necessarily on Wednesday or any particular day. This is to provide more leeway for release managers to prepare releases across timezones.
Coordinated security releases would still occur during the fixed window on the third Wednesday of the month. The bugfix release windows would still be scheduled every month around the first Wednesday, but might occur anywhere from Tuesday to Friday.
Please let us know by April 1 on the core policy discussion issue if you have any concerns with this proposed change. Otherwise, we may plan to have the release window begin at midnight UTC on Wednesday April 6 (Tuesday evening in the western hemisphere) and extend until the release is created (anywhere from that time through the end of the week). Thanks!