...sign of our times...
Upon being handed a journal as a gift, a nine year-old asks his mom what it was. The mom says that it was a notebook to record his thoughts and feelings, every day. The kid replies, "You mean, it is a blog...on paper." Reader's Digest, Oct 2008 issueNice Discussion on Muhurta/ghatika/Meditation time
In Samskrutha literature,
1 Ghatika: 24 minutes
2 ghatikas = 1 muhurtha = 48 minutes
All of this is based on 1/60th of a day. Be sure to read an erudite and informative discussion at the link below. It has implications for the best time for meditation you can determine for your area.
Source: Go HERE
Just in case, the above linked site is down or unresponsive, you can download the PDF file I made of that page here.