<p>2:20 <i>The sun shall be turned into darkness and the moon into blood, before the day of the Lord comes, that great and notable day</i>- Language clearly relevant to the day of the second coming. The conclusion is quite clear- that day could have come in the first century, but it didn't. What was potentially possible didn't happen because Israel didn't repent. And so it has been delayed until our 'last days'.</p>