Lines Matching refs:leap
1 # Allowance for leap seconds added to each time zone file.
6 # NIST/IERS format leap-seconds.list file, which can be copied from
7 # <https://hpiers.obspm.fr/iers/bul/bulc/ntp/leap-seconds.list>
9 # <ftp://ftp.boulder.nist.gov/pub/time/leap-seconds.list>.
10 # For more about leap-seconds.list, please see
12 # <https://www.eecis.udel.edu/~mills/leap.html>.
14 # The rules for leap seconds are specified in Annex 1 (Time scales) of:
20 # periodically uses leap seconds to keep UTC to within 0.9 s of UT1
22 # and publishes leap second data in a copyrighted file
24 # See: Levine J. Coordinated Universal Time and the leap second.
28 # There were no leap seconds before 1972, as no official mechanism
30 # rotation. The first ("1 Jan 1972") data line in leap-seconds.list
31 # does not denote a leap second; it denotes the start of the current definition
34 # All leap-seconds are Stationary (S) at the given UTC time.
36 # event of a negative leap second, a line would look like this:
68 # UTC timestamp when this leap second list expires.
69 # Any additional leap seconds will come after this.