Really be precise about what Q said, bro. He never said "10 days of darkness".
Here are a couple of mentions of 10 and darkness.
Dec 15 2017
Dark [10].
Dec 18 2017
Clock started - 10 days.
Q
Dec 18 2017
Dark.
Darkness.
Learn double meanings.
SHUTDOWN.
The "10 days of darkness" is totally apocryphal, made up by anons who did not recall what he actually said, and has been corrected by other anons many times.
Pic related what Q really said.
He also said (somewhere! I can't find it!)
DARNKESS
which some thought referred to North Korea.
Search qanonposts.com or the 509-page PDF if serious about quoting Q accurately.
Hope it helps.