Monday has a launch window
It leaves on the date it was named for.

Starship September 28 spends Sunday upright, cooling beside the pad and ignoring calendar notifications. At first light on Monday, it checks the sky, counts every loose tile, and points north by going straight up. The destination is unspecified. The departure date is not. Anyone arriving Tuesday may watch the empty launch stand.
The route is a simple broken line: pad, climb, cloud, silence. The vehicle recognizes one schedule and no alternate spelling.
Please stand clear of the calendar.