Postcrossing Blog

Good news, everyone! Just like in the last couple of years, Geocaching is joining the World Postcard Day celebrations with a special souvenir!

In 2025, 20,791 geocachers logged attendance at a World Postcard Day-themed event, and many postcards also made their way to Geocaching HQ in Seattle, where they were proudly displayed around the office. Look how cool their walls look!!

So we’re happy to share that Geocaching is continuing this collaboration in 2026! 🎉

Here’s what you need to know: from September 27 to October 4, 2026, geocachers will be able to earn the World Postcard Day souvenir by attending or hosting a Geocaching Event, as well as finding and logging one Letterbox Hybrid geocache. The dates line up neatly around World Postcard Day, which is on October 1.

By now, I think everyone knows what Geocaching is all about… but for those who might not be familiar with it, it’s a global treasure-hunting game played outdoors with the help of a GPS or smartphone. Players search for hidden containers (called “caches”) all around the world, sign their logbooks, and then share their adventures online. It’s all about getting out there in nature, looking out for treasures with friends!

This year’s extra challenge is kind of cool too: Letterbox Hybrid caches are inspired by letterboxing, a hobby that combines navigation, puzzle-solving and rubber stamp artistry. Many Letterbox Hybrid caches include a stamp for visitors to use in their own logbook… but which could also be used on a postcard, to make it extra fancy! 😍

If you’re organizing or attending a Geocaching event during that week, why not bring a few postcards along? You could write postcards together, exchange them, send one to Geocaching HQ, or even invite other curious geocachers to discover Postcrossing and the World Postcard Day.

And if there isn’t an event near you yet, you can always organize one yourself on the Geocaching website, making sure to follow their event guidelines. If you need ideas, you can check out Geocaching’s wrap-up post from last year, with photos and stories from the 2025 celebrations.

So let your postcards tag along on a little Geocaching adventure! Pack a pen, bring a few postcards, keep an eye out for Letterbox Hybrids, and see where the adventure takes you!