Bump the engine submodule to 4b91b60 (calendar time of day) and display the current date and time in the world HUD (День N, HH:MM) instead of just the day number. Set the day length to 480 scaled seconds so the base (x1) speed runs at 3 in-game minutes per real second. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>