Don’t be ridiculous, that would never pass QA.

But this one will. Joy for years to come:

public string GetDayOfWeek(DateTime date) {
    return ((date - new DateTime(1970, 1, 1)).Milliseconds / 86400000) % 7 switch {
        0 => "Thursday",
        1 => "Friday",
        2 => "Saturday",
        3 => "Sunday",
        4 => "Monday"
    };
}

For distances >600km, flying is usually 4x-10x faster at a similar price. At least in and around Germany. I assume in the US trains compare way worse, also because the distances are way larger.

Examples: “Normal” example: Stuttgart (Germany) -> Amsterdam (Netherlands) Train: 11h 10min - 241€ Plane: 1h 20min - 225€

Best case scenario for train in Germany at around that distance (because there’s a direct connection): München -> Berlin Train: 3h 54min - 167€ Plane: 1h 5min - 226€