general/time-scales
Surf Wiki
Nuclear timescale
Estimate of the lifetime of a star
International Atomic Time
Time standard based on atomic clocks
Time standard
Specification for measuring time
ΔT (timekeeping)
Measure of variation of solar time from atomic time
DUT1
Time scale with correction
Standard time
Synchronization of clocks within a geographical region
Civil time
Statutory local time in some given area