Here is the combined schedule for Firefox/Thunderbird 126.96.36.199. and Firefox 1.0.8. It contains the major steps for development, QA, Build and Community RC. Many things are hard to include on such a high level schedule including last opportunity to land fixes on the trunk, the community test day, etc.
Please note: This is a tight schedule. We have tried not to make it overly optimistic, but also not overly pessimistic. Unforeseen events can cause slips which are likely to effect things downstream. We will update this when major changes to the schedule occur.