Locusts, drought, and the apocalyptic Day of the LORD

Tomorrow in Memes & Themes we're reading the short Old Testament book of Joel.

The author is almost entirely unknown, but can we learn from him?

If you haven't read Joel recently, please join us for discussion here in r/Christian under tomorrow's pinned Memes & Themes post. If you have read it recently and want to jump start the discussion, please let us know your thoughts on Joel's use of "the Day of the LORD."