[gautamcgoel]

Dumb question, but how does the time difference to Silicon Valley vary with the seasons? They are a fixed distance apart.

[zinckiwi]

They are, but daylight saving time means that from April to October the time difference is 5 hours (NZT: +12, PDT: -7) and otherwise it's 3 hours (NZDT +13, PST -8). With a few weeks of a 4 hour difference at the edges since the daylight saving boundaries don't precisely align.