Joel

Joel saw the last days of wars and tribulations before the second coming of the Savior. To those in Zion the Lord said -

"Sanctify ye a fast, call a solemn assembly, gather the elders and all the inhabitants of the land into the house of the LORD your God, and cry unto the LORD..." (Old Testament | Joel 1:14)

And -

"BLOW ye the trumpet in Zion, and sound an alarm in my holy mountain: let all the inhabitants of the land tremble: for the day of the LORD cometh, for it is nigh at hand..." (Old Testament | Joel 2:1)

These words were of such great importance that Joel again repeated -

"Blow the trumpet in Zion, sanctify a fast, call a solemn assembly:
16 Gather the people, sanctify the congregation, assemble the elders, gather the children..." (Old Testament | Joel 2:15 - 16)

And then the Lord provides this promise in these difficult days -

"And it shall come to pass, that whosoever shall call on the name of the LORD shall be delivered: for in mount Zion and in Jerusalem shall be deliverance, as the LORD hath said, and in the remnant whom the LORD shall call." (Old Testament | Joel 2:32)

Much like Malachi would write, Joel also refered to the second coming saying -

"...for the day of the LORD is great and very terrible; and who can abide it?" (Old Testament | Joel 2:11)

For those in Zion, it will be a great day. To the wicked a terrible day for today or -

"...now we call the proud happy; yea, they that work wickedness are set up; yea, they that tempt God are even delivered." (Old Testament | Malachi 3:15)

But -

"...behold, the day cometh, that shall burn as an oven; and all the proud, yea, and all that do wickedly, shall be stubble: and the day that cometh shall burn them up, saith the LORD of hosts, that it shall leave them neither root nor branch." (Old Testament | Malachi 4:1)