Andrew Fribush

fig. 2.27.1: TAI minus UTC from 1972: 27 leap seconds added through 31 December 2016, none since, and continuous UTC from 20 May 2027 under Draft Resolution C

fig. 2.27.1 · TAI minus UTC from 1972: 27 leap seconds added through 31 December 2016, none since, and continuous UTC from 20 May 2027 under Draft Resolution C.
TWENTY-SEVEN SECONDS, THEN NONE: UTC GAINED A SECOND 27 TIMES FROM 1972 TO 2016,AND NOT ONCE SINCEONE RISER IS ONE SECOND ADDED TO TAI − UTC. FILLED DOT: END OF DECEMBER. OPENDOT: END OF JUNE.10203037TAI − UTC, SECONDS197219801990200020102020LONGEST GAP BEFORE: 7 YEARS30 JUN 1972, THE FIRST (OPEN: A JUNE SECOND)NO STEP SINCE 31 DEC 2016NONE AT 31 DEC 2026 (BULLETIN C 72): 10 YEARS31 DEC 2016, THE 27TH: 37 S20 MAY 2027: CONTINUOUS UTCUNDER DRAFT RESOLUTION C27 SECONDS ADDED (11 OPEN, 16 FILLED) · NONE EVER REMOVED

source: IERS Leap_Second.dat lines 14-41 (Bulletin C 72 update, fetched 2026-10-14) · IERS Bulletin C 72 · CGPM 2026 Draft Resolution C · leapSeconds.data.ts

View in context: The second that was added at midnight → · All figures

Andrew Fribush, software and computer engineer in Austin. I build consequential systems where software meets institutions: finance, healthcare, commerce, government data, and the mechanisms that govern AI agents. Taking new engagements: hello@andrewfribush.com.