Joel 2:15

15 Blow the trumpet in Zion, declare a holy fast, call a sacred assembly.

Read Joel 2:15 Using Other Translations

Blow the trumpet in Zion, sanctify a fast, call a solemn assembly:
Blow the trumpet in Zion; consecrate a fast; call a solemn assembly;
Blow the ram’s horn in Jerusalem! Announce a time of fasting; call the people together for a solemn meeting.

What does Joel 2:15 mean?

John Gill's Exposition of the Bible
Joel 2:15

Blow the trumpet in Zion
For the calling of the people together to religious duties, which was one use of the silver trumpets made for and blows by the priests, ( Numbers 10:2 Numbers 10:3 Numbers 10:8 Numbers 10:10 ) ; sanctify a fast, call a solemn assembly; (See Gill on Joel 1:14).

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