The final preparation period for %O4, ending with the start of the %O4 Engineering Run.

This milestone should be added to issues that are to be completed 'before O4 starts'.

Preceeded by : %O4 Final
Succeeded by : %O4 Engineering Run

Start and end dates relative to %O4 start, taken from https://observing.docs.ligo.org/plan/ (accessed 16/Feb/2023).