G. We use will have (done) (future perfect) to say that something will already be complete before a time in the future. (e.g. Sally always leaves for work at 6.30 in the morning. She won't be at home at 9 o'clock - she'll have gone to work)
G1. Compare: Ted and Amy have been married for 24 years. (present perfect) vs. Next year they will have been married for 25 years. vs. When their son was born, they had been married for three years. (past perfect)
Idiom 365
Feeling All In (or be all in): totally exhausted, very tired and unable to do anything more
Example: I'm going home now. I am feeling all in (or I'm all in).