Planning a wedding is all about having a system complete with checklists of items that you need to do before your big day. The most popular venues, photographers, and DJs will all book up faster than some of the less popular companies and options. We always refer to these as "the big three". Once you book these three wedding vendors, the rest can more easily fall into place as time goes on.  A popular, reputable DJ company will book between 12 and 18 months in advance, but it's not uncommon for the months of May/June/September/October to start booking 24 months in advance. This is all assuming that the engagement period is long enough to support these timelines. Every year we see couples that are only doing a 12 month (and sometimes less) engagement, and those last-minute weddings will always happen too. After all, if two people are so in love that they don't want to wait – why not go for it!