I would like a challenge checker created for GC7FHHV which requires a cacher to find caches in 8 different time zones.

Here is the checker https://project-gc.com/Challenges/GC7FHHV/30528

You might however get difficulties to get approval from your reviewer because timezones are not recognized as acceptble area's. Although the checker is based on countries and in some cases regions the checker mentions timezones

Please keep this in mind and you might first get advice from your local reviewer before submitting the challenge

The script is based on countries, regions and counties to get the closest to the timezone definitions I could without using other polygons (there are roughly half a dozen counties in the world which are actually split between timezones). But I have heard of reviewers rejecting timezone challenges because they aren't specified in terms of countries, regions or counties.

Sorry, this is the one the reviewer won't accept. I saw a grandfathered one, but I see current rules are different. Thanks for trying.