I "poured" 10 sacks of concrete in a hole yesterday afternoon at about 1:00 for a base for lamp post.  I mixed them in a wheelbarrow and might have had it a touch wet but it was not soupy. I figured it would take a while to cure but as of noon today I was still able to press a finger into it.  It was about 60 degrees yesterday with sun and no wind.  It did not freeze last night according to my weather station although there was some light frost on the ground near the concrete.  How long might it take to firm up?