קַדְּשׁוּ־צוֹם֙ קִרְא֣וּ עֲצָרָ֔ה אִסְפ֣וּ זְקֵנִ֗ים כֹּ֚ל יֹשְׁבֵ֣י הָאָ֔רֶץ בֵּ֖ית יְהוָ֣ה אֱלֹהֵיכֶ֑ם וְזַעֲק֖וּ אֶל־יְהוָֽה׃
Sanctify ye a fast, Call a solemn assembly, Gather the elders And all the inhabitants of the land Unto the house of the LORD your God, And cry unto the LORD.
Read halakhic rulings (Jewish law) on Joel 1:14: and classical halakhic sources.