Currently it's a little bit awkward to use o-clock in several places... This issue is devoted to collect such things:

• Add .ghci to repository. It's not convenient to enable language extensions and add required imports manually every time when entering cabal new-repl.
• Create time from rational time more conveniently. If you want 2/7 of day you can use one of the following ways (I don't find any of these ways convenient):
  1. Time @Day (2 % 7)
  2. timeMul (1 % 7) (day 2)
  3. fromRational @(Time Day) (2 % 7)
• Subtract time of different units more conveniently. We have +: operator for sec 3 +: minute 3. I want something similar but for subtraction (see example in Make 'seriesF' implementation more precise #60). Unfortunately, -: operator is very popular on Hackage. So we need another convention for arithmetic operators.