I recently read an article on polyphasic sleep and I'm quite interested in experimenting with it. The article advises the Uberman approach which advocates 20-30 minute naps every four hours, meaning ...
As per this question, it seems apparent that one doesn't make the morning blessings until at least alos hashachar. However, in Rabbi Avraham Greenbaum's book "The Sweetest Hour: Tikkun Chatzot," on ...
How can I calculate the last possible time to say Kiddush Levanah for a given month?