It is 10 days exactly in 40 minutes.
Just sayin'.
If you count from the 13th, 10 days dark is thru the 23rd inclusive, meaning the 24th (11th day) is when a post can occur.
13 - Posted
14 - No Post
15 - No Post
16 - No Post
17 - No Post
18 - No Post
19 - No Post
20 - No Post
21 - No Post
22 - No Post
23 - No Post
24 …..First day after 10 days with no post….