Q-drop 88 does not read, '10 days of darkness', it reads '10 days. Darkness.' And drop 97 reads, '10 days. Darnkess.'
Could it be 10 days 'until' darkness? So, yesterday, Good Friday, was 10 days 'until' darkness.
I'm not date-fagging, we will have 'darkness' in nine days, now!
The Death of Jesus: From noon until three in the afternoon darkness came over all the land.
https://www.christianity.com/wiki/holidays/what-do-we-know-about-the-crucifixion-of-jesus.html
So, 10 days from this day of darkness is April 8th, the solar eclipse.
And Easter always seems to fall on different dates, so this could have been calculated as a marker. Who knows?