From Grammerly:
It is also customary to use less with regard to time, even though we can count time in seconds, minutes, hours, and so on.
Example:
Ethan has been at his job for less than five years.
I wish I could spend less time on household chores.
Yet, depending on how general or specific your reference to time is, it may require the use of fewer.
Example:
I wish I could spend fewer hours on household chores and more on watching television.
Both less and fewer are perfectly acceptable in this context.
Both tweets are fake.