I'm opening this PR more for discussion than anything else. Ostensibly it addresses #5, but the code as written doesn't provide any of the suggested examples.

I tried to perform a more-or-less direct translation of Go by Example: Time. Along the way I noticed several things:

• Haskell's time library is not looking very good by comparison to Go's time package. For example, in Haskell creating a "time" (really a ZonedTime) takes 3 constructors, one function call, and one value. In Go it's a single method.

• I used ZonedTime because it matched Go, but I think most "real" Haskell code uses UTCTime. Pretty much everything I write does, at least.

• Go by Example has another entire page on formatting: https://gobyexample.com/time-formatting-parsing

• Getting particular parts of the time are surprisingly challenging. For example, getting the year requires throwing away the time zone, then focusing on the day piece, then destructuring a 3-tuple. That's especially awkward because combinators for 3-tuples (like fst3) aren't super common. (On the other hand, I frequently work with times and almost never need to get just the year part of a time.)

• Splitting apart seconds into the whole number part and the fractional part is challenging. Getting the whole number part is easy enough: truncate. But getting the fractional part would take some puzzling. Something like s - fromIntegral (truncate s) comes to mind, but that's gross.

• ZonedTime values can't be compared directly. I think the time library does this to make you choose between comparing them as local times or as absolute times. Either way, it makes this example super annoying. (As I said before, I almost always use UTCTime.)

• The time library doesn't provide any handy conversion functions, like for getting the length of a duration in hours. It's not hard to do the conversion manually, but it's not as nice as having a function for it.

In short, I feel like the Go example doesn't fit well into Haskell. Maybe things would be better with a different library. I think the Go example is a bit weird though, and shows off things I don't often do with time libraries.

I think the Haskell Phrasebook would be better off using some different examples. I'll spend some time tomorrow coming up with some more typical Haskell time usage.