Whenever leap seconds were added, Google was running the clocks on their servers slower/faster over a longer period of time (hours) so they would slowly drift b

Whenever leap seconds were added, Google was running the clocks on their servers slower/faster over a longer period of time (hours) so they would slowly drift back in sync with the solid platinum, perfectly spherical grandfather's clock sitting in NIST or whatever: https://developers.google.com/time/smear https://developers.google.com/time/smear