Joel 2:28  And it shall come to pass afterward, that I will pour out
my spirit upon all flesh; and your sons and your daughters shall
prophesy, your old men shall dream dreams, your young men shall see
visions:

Acts 2:17  And it shall come to pass in the last days, saith God, I
will pour out of my Spirit upon all flesh: and your sons and your
daughters shall prophesy, and your young men shall see visions, and
your old men shall dream dreams:

   It does really appear to me that the context of these verses
pertain to what is happening during the final events just before the
"day of the Lord"; second coming. That these dreams and visions are to
encourage the remnant believers to hold on, to continue in belief and
service, despite the horrors they are going through.
   Maranatha,  Lewis B