This has been requested for years and these muppets still haven't
implemented it. Can't fathom the logic of it. My ancient timer before
the Nest had the ability to set 10 min increments.
I requested this feature about 3 years ago and they've still not done
anything. It's ridiculous. Surely the whole point of this thing being
'smart'and digital is that you could set it exactly how you want.