From the Geocaching.com Blog:
Where in the World is Signal the Frog?
https://www.geocaching.com/blog/2017/02/where-in-the-world-is-signal-hint-gruse-aus-deutschland/
About Dönerstag:
Dönerstag began in 2007 when German cachers met at kebab shops around the country all at the same time. The tradition caught on!
These special events are held each year on a Thursday. In German, this makes the name “Dönerstag” a pun: The German word for Thursday is “Donnerstag.” Kebab translates to “Döner.”
Last year, over 6000 players attended 233 Dönerstag events. The events were held all over Europe, from Germany and Austria to the United Kingdom and Switzerland.
You’re invited to join in this year’s Dönerstag from wherever you are in the world. Attend and log a geocaching event on April 13, 2017, to earn the souvenir.
We will celebrate it right here in Jacksonville, Arkansas. Please join us at at the posted coordinates, Dupree Park, for a continental breakfast. We'll meet from 6:00-6:30 a.m. Then off to work!
Remember, you can earn the first-ever Dönerstag souvenir by attending a geocaching event on April 13, 2017!