When I was a young ham radio operator, I would listen to WWV often, both for time and propagation. I ordered a publication http://tf.nist.gov/general/pdf/1788.p

When I was a young ham radio operator, I would listen to WWV often, both for time and propagation. I ordered a publication http://tf.nist.gov/general/pdf/1788.pdf http://tf.nist.gov/general/pdf/1788.pdf which has just about my favorite title for an article Dating of Events in the Vicinity of Leap Seconds. More modern material is at https://www.nist.gov/pml/time-and-frequency-division/leap-seconds-faqs https://www.nist.gov/pml/time-and-frequency-division/leap-se.... A good resource for red hat linux is https://access.redhat.com/articles/15145 https://access.redhat.com/articles/15145. And another resource is https://ics-cert.us-cert.gov/sites/default/files/documents/Best_Practices_for_Leap_Second_Event_Occurring_on_31_December_2016_S508C.pdf https://ics-cert.us-cert.gov/sites/default/files/documents/B...