To Determine if Ruby Has a Time Object Within 24 Hours

time=Time.zone.now
time>1.day.ago

In a Rails environment, you can write like this.
I think it will be easier to read colloquially.

http://railsdoc.com/references/ago

It looks like a Rails environment, so it's easy to use 1.day.

(Time.zone.now-time)<1.day

true if the time specified in is within 1 day (=24 hours).
Of course, 24.hours can be used instead of 1.day.