http://hpiers.obspm.fr/eop-pc/earthor/utc/leapsecond. html
"... Since the system was introduced in 1972, " The table starts in 1972. Before that, GMT was in use - not UT1! - Flavio S. Glock
http://hpiers.obspm.fr/eop-pc/earthor/utc/leapsecond. html
"... Since the system was introduced in 1972, " The table starts in 1972. Before that, GMT was in use - not UT1! - Flavio S. Glock