Talk:A Challenge by Phantom's/@comment-33969158-20170211185243/@comment-24507077-20170212004224

The 24 hour/day cycle starts at 12  midnight (often indicated as  12 a.m.), runs through 12  noon (often indicated as 12 p.m.), and continues to the  midnight at the end of the day. The 12-hour clock was developed over time from the mid-second millennium BC to the 16th century AD.