Passage
the sun shall be changed to darkness and the moon to blood, before the great and gloriously appearing day of [the] Lord come.
the sun shall be changed to darkness and the moon to blood, before the great and gloriously appearing day of [the] Lord come.
Acts 2:18 yea, even upon my bondmen and upon my bondwomen in those days will I pour out of my Spirit, and they shall prophesy.
Acts 2:19 And I will give wonders in the heaven above and signs on the earth below, blood, and fire, and vapour of smoke:
Acts 2:20 the sun shall be changed to darkness and the moon to blood, before the great and gloriously appearing day of [the] Lord come.
Acts 2:21 And it shall be that whosoever shall call upon the name of [the] Lord shall be saved.
Acts 2:22 Men of Israel, hear these words: Jesus the Nazaraean, a man borne witness to by God to you by works of power and wonders and signs, which God wrought by him in your midst, as yourselves know
The verse centers on "darkness", "shall", "changed", "moon", "blood", "before", "great", and "gloriously". It is saying that the verse draws attention to "darkness" and "shall", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 19's "And I will give wonders in the..." into verse 21's "And it shall be that whosoever shall...", so "darkness" and "shall" belong inside that flow. In Acts context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "darkness" and "shall" with trust shaped by these words, not by a vague optimism outside the passage.