The Global Monitoring Laboratory conducts research on greenhouse gas and carbon cycle feedbacks, changes in clouds, aerosols, and surface radiation, and recovery of stratospheric ozone.
https://gml.noaa.gov/grad/solcalc/
Which specific thing is he trying to say occurs 24 hours apart?
because: Solar noon? (no)
or: Sun in same position in the sky? (no)
If he's trying to say: "it takes one mean solar day to for the sun to get from one solar noon to the next" that's also wrong because a mean solar day is an average, so it's not always correct to say that the solar noon will happen one mean solar day after the previous one.