1 You can't use \include inside a file which is read by \include. 2  This is by intention and is because to avoid issues with the .aux files. 3  Otherwise three .aux files (main, parent \include, child \include) would be open at the same time which was deemed to complicated I guess.
Timing the Invitations. It is customary to mail your wedding invitations about eight weeks before your wedding date. If you have already mailed your save-the-date cards, then your wedding guests will be expecting your actual wedding invitations in the mail. The process of choosing your wedding invitations and preparing them to be sent out can be time-consuming so it is important to not procrastinate and allow yourself plenty of time.
Q&A: Invitations: When to Send Wedding Invitations? How far in advance should you send wedding invitations? Ideally, invitations should go out eight weeks before the wedding -- this gives guests plenty of time to clear their schedules for the day and make travel arrangements if they are out-of-towners.