Compute the next review days.
> go run main.go
DAY OF REVIEWS
03:Mon, 04:Apr of 2023
04:Tue, 04:Apr of 2023
06:Thu, 04:Apr of 2023
10:Mon, 04:Apr of 2023
18:Tue, 04:Apr of 2023
04:Thu, 05:May of 2023
05:Mon, 06:Jun of 2023
08:Tue, 08:Aug of 2023
14:Thu, 12:Dec of 2023inspired by Forgetting curve.