Halloween is a fantastic time for outreach and many churches make the most of it with Trunk or Treat, a Fall Festival and similar outreach activities.
In addition to that, it can also be a great time to encourage your people to invite their friends to these events. To do that, I did up a flyer or bulletin insert that encourages your congregation to use this time of year and the events of your church as a great time to share their faith. Below are images of the flyer, a podcast that I did for it, and below that the text of the flyer you can use in whatever way you want.
Podcast that talks about the handout and how to use it:
Text for the flyer to use however you'd like: