<ref name="shippingscreen">See <samp>ShippingMenu::update</samp> in the game code. The code states that the UFO cannot occur when the game date is 28, but the date changes internally before the shipping screen is displayed.</ref> | <ref name="shippingscreen">See <samp>ShippingMenu::update</samp> in the game code. The code states that the UFO cannot occur when the game date is 28, but the date changes internally before the shipping screen is displayed.</ref> |