The rule of thumb is to mail wedding invitations 6 to 8 weeks prior to the wedding day.  A few circumstances can make this window of time smaller or larger.  For instance, if most guests are from the local area where the wedding is taking place and a Save The Date card was mailed prior, then we suggest the 6 weeks timeframe to mail the invitations.  On the other hand, if a significant number of people are from out of town and the wedding date is on December 31, then we suggest to give your guest more time by mailing the invitations 8 to 10 weeks prior.