I have searched this Mi Yodea site extensively and can find no references. I am almost positive that this is not a duplicate, or answered somewhere else.Thank you.
I use the Halachic Times App (Halachic Times by Moshe Waisberg {developer [email protected]})
I have written to the developer and asked the question on the APP itself., and received no answer from him
The exact sequence is: Twilight; Nightfall; Midnight Guard-First Watch; Midnight; Morning Guard-Third Watch. Sunrise, and the earliest time for SHEMA are given;
MY QUESTION: (While interesting) HOW, and WHY, are these times relevant to us today; and WHY do we need to know them?