Check AsTime vs local timezone

[bep]

https://discourse.gohugo.io/t/mage-v-check-error/34066

[bep]

OK, @jmooring -- I have checked your test failure, and that comes from the behaviour of time.Parse:

// When parsing a time with a zone offset like -0700, if the offset corresponds
// to a time zone used by the current location (Local), then Parse uses that
// location and zone in the returned time. Otherwise it records the time as
// being in a fabricated location with time fixed at the given zone offset.

The reason this passed earlier was that we used time.ParseInLocation, but that has its own set of worse issues:

spf13/cast#80 (comment)

I'm going to fix this by adjusting the tests ... Shout if you disagree.