Re: how would you feel about this???
your FH should approach him about it. Maybe FFIL isn't as familiar with the etiquette; that the bride is the only one who should wear white. Also, a white dinner jacket is usually only worn for black tie weddings (I think). This is from wiki pedia
The white dinner jacket is often worn in warm climates. It is usually ivory in colour rather than pure white, and does not have silk-faced lapels. It is worn with exactly the same clothes as a normal jacket, except for the most formal variations (such as a winged collar). In the U.S. and Canada a white dinner jacket is traditionally worn only from Memorial Day in the spring to Labor Day. (This rule applies also to white summer clothes, including shoes and suits.) In the UK, the traditional rule is that white dinner jackets are never worn, even on the hottest day of summer, but are reserved for wear abroad.[3] Some exceptions to these rules are, in America, its use in high-school proms., and in Britain some concerts, famously for instance the Last Night. In other tropical climates, such as in Imperial Burma, the less formal colour was desert fawn.
The white dinner jacket is often worn in warm climates. It is usually ivory in colour rather than pure white, and does not have silk-faced lapels. It is worn with exactly the same clothes as a normal jacket, except for the most formal variations (such as a winged collar). In the U.S. and Canada a white dinner jacket is traditionally worn only from Memorial Day in the spring to Labor Day. (This rule applies also to white summer clothes, including shoes and suits.) In the UK, the traditional rule is that white dinner jackets are never worn, even on the hottest day of summer, but are reserved for wear abroad.[3] Some exceptions to these rules are, in America, its use in high-school proms., and in Britain some concerts, famously for instance the Last Night. In other tropical climates, such as in Imperial Burma, the less formal colour was desert fawn.
