Sep. 30, 2016 9:00am

So, Halloween’s coming up—and we got an email this week from our daycare/preschool announcing the upcoming Halloween festivities. We can send our kids in the costumes of our choice, so long as we “refrain from bringing weapons to go with the costume.”

I was so relieved to see that a zero-tolerance mentality extends to our daughter’s daycare as well; after all, we live in a crazy world.

I’ve never known such constant fear as that which I now experience as a parent. For those of you out there who aren’t yet, well— it’s just inexplicable. You worry from the moment you wake up until the moment you go to bed, and even after. It’s a hard slog, this parenting thing.

In this world of evil people, I breathe a sigh of relief when I know that our nation’s schools—where so many of us entrust our precious children most of the day—are gun-free zones.

I know my relief is shared by the families of the 141 students and faculty “killed in a mass murder or attempted mass murder at a school since Columbine.”

I know my relief is shared by the families of the 235 students and faculty killed in all school shootings since Columbine.

I know my relief is shared by the families of the 334 students and faculty injured in all school shootings since Columbine.

I know my relief is shared by the families of the two children and a teacher in a Townville, South Carolina elementary school who were shot earlier this week.

Members of law enforcement talk in front of Townville Elementary School on Wednesday, Sept. 28, 2016, in Townville, S.C. A teenager opened fire at the South Carolina elementary school Wednesday, wounding two students and a teacher before the suspect was taken into custody, authorities said. (AP Photo/Rainier Ehrhardt)

And it’s not just our nation’s schools that are such havens of non-violence.

I feel immense relief knowing that—as outlined in this study—“92 percent of mass public shootings between January 2009 and July 2014 took place in gun-free zones.”

I know my relief is shared by the families of the 50 people killed in the Pulse nightclub attack, a gun free zone.

I know my relief is shared by the family of former “The Voice” contestant Christine Grimmie who was shot and killed in a gun-free concert venue.

I know my