NEOS

NEOS hasn't been updated since July. They aren't letting us know how the earth's rotation is going since that date. Verrry interesting.

Offered by John.

Certain guidelines define when leap seconds will occur:

• |UTC-UT1| > 0.7 seconds,
• after 23:59:59 on "June 30 or December 31" only

Offered by Pat.