From what I have read, STD's usually go out 6 months in advance, but since our wedding is on a holiday weekend (weekend before Christmas) we wanted to give guests more notice so they can plan accordingly. However, my FI brother is also getting married this year, in May. Is it tacky to send our STD before their wedding? I don't want to bombard on side of the family with so much wedding stuff so close together or cause any kind of problems with my future brother-in-law and his bride. Any etiquette on this?