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With your crew’s crazy schedules, it can be tricky to find the perfect date for a bachelor or bachelorette party. You might be wondering when bachelor or bachelorette parties usually happen, so that you can pick an ideal weekend for the big event—and we’re here to help! According to a WeddingWire study, there’s definitely a “bachelor(ette) party season” when most of these events take place. We also learned a lot about how long before the wedding these events typically occur, so you’ll be able to plan accordingly.

Wondering when a bachelor or bachelorette party should happen? Here are the timing tips you need to know.

Bachelor and bachelorette parties usually occur pretty close to the wedding day.

So if go by movie plot lines, you’d think that all bachelor and bachelorette parties occur the night before the wedding (we’re looking at you, The Hangover). While this isn’t exactly true, it turns that a majority of both bachelor and bachelorette parties happen within the month prior to the wedding. According to the WeddingWire study, 63 percent of bachelor parties and 55 percent of bachelorette parties occur within a month of the wedding. So while this doesn’t mean that hosting your last-single-night bash the same weekend of your wedding is a good idea (IMO, it’s really not a good idea), a few weeks prior is actually the norm.

And for those Type A pre-planners out there, know that planning a bachelor or bachelorette party too far in advance of the wedding is not the best idea, either. The sweet spot really seems to be three months or less before the wedding—fewer than 10 percent of bachelor and bachelorette parties occur more than four months prior to the big day.  

Spring and summer are the most popular seasons for bachelor and bachelorette parties.

You may have already heard that fall is the most popular season for weddings—40 percent of weddings in the U.S. take place during the fall season. So it makes sense that most bachelor and bachelorette parties happen in the spring and summer months—just a short time before wedding season hits its peak. According to the WeddingWire study, April is the most popular month for bachelorette parties, and May is when the most bachelor parties occur. Another interesting tidbit—bachelor parties are more likely to celebrated during the summer, while bachelorettes more commonly take place in the springtime.

Since it also turns out that most bachelor and bachelorette parties don’t take place far from the guests’ home base, it would make sense that warmer weather months are appealing—especially if outdoor activities are on the agenda. However, this is not to say that planning a bachelor or bachelorette party in the fall or winter months is a bad idea (in fact, 31 percent of bachelorette and 30 percent of bachelor parties occur during this time of year). In fact, they can be quite welcomed if you live in a cold-weather area and are booking a trip to a warm-weather destination!  

Bachelor and bachelorette parties tend to last one to two days.

As you’re penciling in those dates when your bachelor or bachelorette party will happen, you’re probably also considering how long the festivities will last. According to our study, 67 percent of bachelorette parties and 66 percent of bachelor parties last for one to two days. This lines up with the idea of a bachelor or bachelorette party weekend, and the fact that many people can’t take too much time away from work and family obligations. And, as we also learned, the longer a bachelor or bachelorette party lasts, the more money your crew will end up spending!